[INFO] cloning repository https://github.com/qinxiaoguang/rs-lc
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qinxiaoguang/rs-lc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqinxiaoguang%2Frs-lc"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqinxiaoguang%2Frs-lc'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b6e298a179aa943ac45734c256fe94a7f6e0c17b
[INFO] checking qinxiaoguang/rs-lc against master#e2223c94bf433fc38234d1303e88cbaf14755863 for pr-69548
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqinxiaoguang%2Frs-lc" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qinxiaoguang/rs-lc on toolchain e2223c94bf433fc38234d1303e88cbaf14755863
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e2223c94bf433fc38234d1303e88cbaf14755863" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/qinxiaoguang/rs-lc
[INFO] finished tweaking git repo https://github.com/qinxiaoguang/rs-lc
[INFO] tweaked toml for git repo https://github.com/qinxiaoguang/rs-lc written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/qinxiaoguang/rs-lc already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e2223c94bf433fc38234d1303e88cbaf14755863" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e2223c94bf433fc38234d1303e88cbaf14755863" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 295e8551c3c6cbd9548f63ec5f79e263ed389f5834ea0ec717bff5cca1137ec2
[INFO] running `"docker" "start" "-a" "295e8551c3c6cbd9548f63ec5f79e263ed389f5834ea0ec717bff5cca1137ec2"`
[INFO] [stderr]     Checking rs-lc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/solution/l008.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if (v <= (std::i32::MIN) as i64) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/solution/l008.rs:55:19
[INFO] [stderr]    |
[INFO] [stderr] 55 |         } else if (v >= (std::i32::MAX) as i64) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l032.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | / macro_rules! sf {
[INFO] [stderr] 3 | |     ($str:expr) => {
[INFO] [stderr] 4 | |         String::from($str)
[INFO] [stderr] 5 | |     };
[INFO] [stderr] 6 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/solution/l033.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l033.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l033.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/solution/l034.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l034.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l034.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/solution/l035.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l035.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l035.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashMap`
[INFO] [stderr]  --> src/solution/l036.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l036.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l036.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l038.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l038.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l038.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l039.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l039.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l039.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l039.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashMap`
[INFO] [stderr]  --> src/solution/l040.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l040.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l040.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l041.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l041.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l041.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l041.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l042.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l042.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l042.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l042.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l043.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l043.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l043.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l045.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l045.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l045.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l045.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/solution/l045.rs:48:22
[INFO] [stderr]    |
[INFO] [stderr] 48 |             for j in (1..=nums[i]) {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l046.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l046.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l046.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l046.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/solution/l008.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if (v <= (std::i32::MIN) as i64) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l047.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l047.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l047.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/solution/l008.rs:55:19
[INFO] [stderr]    |
[INFO] [stderr] 55 |         } else if (v >= (std::i32::MAX) as i64) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l032.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | / macro_rules! sf {
[INFO] [stderr] 3 | |     ($str:expr) => {
[INFO] [stderr] 4 | |         String::from($str)
[INFO] [stderr] 5 | |     };
[INFO] [stderr] 6 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/solution/l033.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l033.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l033.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/solution/l034.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l034.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l034.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/solution/l035.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l035.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l035.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashMap`
[INFO] [stderr]  --> src/solution/l036.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l036.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l047.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l036.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l038.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l038.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l038.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l048.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l048.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l048.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l048.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `solution::l002::Solution`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use solution::l002::Solution;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l039.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l039.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l039.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l039.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashMap`
[INFO] [stderr]  --> src/solution/l040.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l040.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l040.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l041.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l041.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l041.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l041.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l042.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l042.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l042.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l042.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l043.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l043.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l043.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l045.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l045.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l045.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l045.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/solution/l045.rs:48:22
[INFO] [stderr]    |
[INFO] [stderr] 48 |             for j in (1..=nums[i]) {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l046.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l046.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l046.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l046.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l047.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l047.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l047.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l047.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]  --> src/solution/l048.rs:2:24
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l048.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l048.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / macro_rules! map {
[INFO] [stderr] 12 | |     ($($k:expr => $v:expr),*) => {
[INFO] [stderr] 13 | |         {
[INFO] [stderr] 14 | |             let mut map = HashMap::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     };
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l048.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/solution/test.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `solution::l002::Solution`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use solution::l002::Solution;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/solution/l005.rs:58:26
[INFO] [stderr]    |
[INFO] [stderr] 58 |             .filter(|(i, c)| i >= &start && i <= &end)
[INFO] [stderr]    |                          ^ help: consider prefixing with an underscore: `_c`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/solution/l005.rs:59:20
[INFO] [stderr]    |
[INFO] [stderr] 59 |             .map(|(i, c)| c)
[INFO] [stderr]    |                    ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `v` is never read
[INFO] [stderr]   --> src/solution/l008.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let mut v = 0_i64;
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]  --> src/solution/l010.rs:9:21
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stderr]   |                     ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]  --> src/solution/l010.rs:9:32
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stderr]   |                                ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/solution/l034.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let mut res = -1_i32;
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/solution/l034.rs:96:17
[INFO] [stderr]    |
[INFO] [stderr] 96 |         let mut res = -1_i32;
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `swap_index` is never read
[INFO] [stderr]   --> src/solution/l041.rs:50:17
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let mut swap_index = 0_i32;
[INFO] [stderr]    |                 ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l029.rs:31:27
[INFO] [stderr]    |
[INFO] [stderr] 31 |             let (mut cnt, mut mod_v) = Self::my_divide(dividend - divisor, divisor);
[INFO] [stderr]    |                           ----^^^^^
[INFO] [stderr]    |                           |
[INFO] [stderr]    |                           help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l034.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let mut res = -1_i32;
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l034.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |         let mut res = -1_i32;
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l036.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut set = HashSet::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 41 |         let mut col_set: Vec<HashSet<char>> = vec![set![]; 9];
[INFO] [stderr]    |                                                    ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l036.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut set = HashSet::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 42 |         let mut row_set: Vec<HashSet<char>> = vec![set![]; 9];
[INFO] [stderr]    |                                                    ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l036.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut set = HashSet::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 43 |         let mut square: Vec<Vec<HashSet<char>>> = vec![vec![set![]; 3]; 3];
[INFO] [stderr]    |                                                             ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l040.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut set = HashSet::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 40 |         let mut res: HashSet<Vec<i32>> = set![];
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/solution/l002.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(val: i32) -> Self {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/solution/l002.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub struct Solution {}
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_two_numbers`
[INFO] [stderr]   --> src/solution/l002.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     pub fn add_two_numbers(
[INFO] [stderr] 18 | |         l1: Option<Box<ListNode>>,
[INFO] [stderr] 19 | |         l2: Option<Box<ListNode>>,
[INFO] [stderr] 20 | |     ) -> Option<Box<ListNode>> {
[INFO] [stderr] ...  |
[INFO] [stderr] 63 | |         }
[INFO] [stderr] 64 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l003.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `length_of_longest_substring`
[INFO] [stderr]  --> src/solution/l003.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l004.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_median_sorted_arrays`
[INFO] [stderr]  --> src/solution/l004.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn find_median_sorted_arrays(nums1: Vec<i32>, nums2: Vec<i32>) -> f64 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_k`
[INFO] [stderr]   --> src/solution/l004.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn find_k(nums1: &[i32], nums2: &[i32], k: usize) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l005.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_palindrome`
[INFO] [stderr]  --> src/solution/l005.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn longest_palindrome(s: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l006.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `convert`
[INFO] [stderr]  --> src/solution/l006.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn convert(s: String, num_rows: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l007.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse`
[INFO] [stderr]  --> src/solution/l007.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn reverse(x: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l008.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `my_atoi`
[INFO] [stderr]  --> src/solution/l008.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn my_atoi(str: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l009.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_palindrome`
[INFO] [stderr]  --> src/solution/l009.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn is_palindrome(x: i32) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l010.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_match`
[INFO] [stderr]  --> src/solution/l010.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l011.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_area`
[INFO] [stderr]  --> src/solution/l011.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn max_area(height: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l014.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_common_prefix`
[INFO] [stderr]  --> src/solution/l014.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l015.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `three_sum`
[INFO] [stderr]  --> src/solution/l015.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn three_sum(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]   --> src/solution/l015.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn two_sum(nums: &[i32], target: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l016.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `three_sum_closest`
[INFO] [stderr]  --> src/solution/l016.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn three_sum_closest(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum_closest`
[INFO] [stderr]   --> src/solution/l016.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn two_sum_closest(nums: &[i32], target: i32) -> (i32, i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l017.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `letter_combinations`
[INFO] [stderr]  --> src/solution/l017.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn letter_combinations(digits: String) -> Vec<String> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_all_letter`
[INFO] [stderr]   --> src/solution/l017.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 | /     fn get_all_letter(
[INFO] [stderr] 25 | |         now_letter: &str,
[INFO] [stderr] 26 | |         chars: &[char],
[INFO] [stderr] 27 | |         map: &HashMap<char, Vec<char>>,
[INFO] [stderr] ...  |
[INFO] [stderr] 40 | |         }
[INFO] [stderr] 41 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l018.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `four_sum`
[INFO] [stderr]  --> src/solution/l018.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn four_sum(nums: Vec<i32>, target: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]   --> src/solution/l018.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn two_sum(nums: &[i32], target: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/solution/l019.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn new(val: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/solution/l019.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub struct Solution {}
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_nth_from_end`
[INFO] [stderr]   --> src/solution/l019.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn remove_nth_from_end(head: Option<Box<ListNode>>, n: i32) -> Option<Box<ListNode>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]   --> src/solution/l019.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn remove(head: Option<Box<ListNode>>, n: i32) -> (Option<Box<ListNode>>, i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l020.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid`
[INFO] [stderr]  --> src/solution/l020.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn is_valid(s: String) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l022.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `generate_parenthesis`
[INFO] [stderr]  --> src/solution/l022.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn generate_parenthesis(n: i32) -> Vec<String> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `generate`
[INFO] [stderr]   --> src/solution/l022.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn generate(now_string: String, left: i64, right: i64, sum: i64, res: &mut Vec<String>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l026.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_duplicates`
[INFO] [stderr]  --> src/solution/l026.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l027.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_element`
[INFO] [stderr]  --> src/solution/l027.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn remove_element(nums: &mut Vec<i32>, val: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l029.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `divide`
[INFO] [stderr]  --> src/solution/l029.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn divide(dividend: i32, divisor: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `my_divide`
[INFO] [stderr]   --> src/solution/l029.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn my_divide(dividend: i64, divisor: i64) -> (i64, i64) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l030.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_substring`
[INFO] [stderr]  --> src/solution/l030.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn find_substring(s: String, words: Vec<String>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_equal`
[INFO] [stderr]   --> src/solution/l030.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn is_equal(map1: &HashMap<&str, i32>, map2: &HashMap<&str, i32>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l031.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_permutation`
[INFO] [stderr]  --> src/solution/l031.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn next_permutation(nums: &mut Vec<i32>) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l032.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_valid_parentheses`
[INFO] [stderr]   --> src/solution/l032.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn longest_valid_parentheses(s: String) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cal_long`
[INFO] [stderr]   --> src/solution/l032.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn cal_long(s: &str) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l033.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search`
[INFO] [stderr]   --> src/solution/l033.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn search(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `my_search`
[INFO] [stderr]   --> src/solution/l033.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn my_search(nums: &[i32], target: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l034.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search_range`
[INFO] [stderr]   --> src/solution/l034.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn search_range(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_left`
[INFO] [stderr]   --> src/solution/l034.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn find_left(nums: &[i32], target: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_right`
[INFO] [stderr]   --> src/solution/l034.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     fn find_right(nums: &[i32], target: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l035.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search_insert`
[INFO] [stderr]   --> src/solution/l035.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn search_insert(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l036.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid_sudoku`
[INFO] [stderr]   --> src/solution/l036.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn is_valid_sudoku(board: Vec<Vec<char>>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `contains_or_insert`
[INFO] [stderr]   --> src/solution/l036.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     fn contains_or_insert(set: &mut HashSet<char>, c: char) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l038.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `count_and_say`
[INFO] [stderr]   --> src/solution/l038.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn count_and_say(n: i32) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l039.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `combination_sum`
[INFO] [stderr]   --> src/solution/l039.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn combination_sum(candidates: Vec<i32>, target: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backtracking`
[INFO] [stderr]   --> src/solution/l039.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn backtracking(condidates: &[i32], target: i32, res: &mut Vec<Vec<i32>>, tmp: &mut Vec<i32>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l040.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `combination_sum2`
[INFO] [stderr]   --> src/solution/l040.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn combination_sum2(candidates: Vec<i32>, target: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backtracking`
[INFO] [stderr]   --> src/solution/l040.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 | /     fn backtracking(
[INFO] [stderr] 52 | |         condidates: &[i32],
[INFO] [stderr] 53 | |         target: i32,
[INFO] [stderr] 54 | |         res: &mut HashSet<Vec<i32>>,
[INFO] [stderr] ...  |
[INFO] [stderr] 74 | |         }
[INFO] [stderr] 75 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l041.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `first_missing_positive`
[INFO] [stderr]   --> src/solution/l041.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn first_missing_positive(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l042.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `trap`
[INFO] [stderr]   --> src/solution/l042.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn trap(height: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l043.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `multiply`
[INFO] [stderr]   --> src/solution/l043.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn multiply(num1: String, num2: String) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `bignum_add`
[INFO] [stderr]   --> src/solution/l043.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn bignum_add(num1: String, num2: String) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l045.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `jump`
[INFO] [stderr]   --> src/solution/l045.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn jump(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l046.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `permute`
[INFO] [stderr]   --> src/solution/l046.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn permute(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `dfs`
[INFO] [stderr]   --> src/solution/l046.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn dfs(nums: &[i32], used: &mut [bool], res: &mut Vec<Vec<i32>>, tmp: &mut Vec<i32>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l047.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `permute_unique`
[INFO] [stderr]   --> src/solution/l047.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn permute_unique(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `dfs`
[INFO] [stderr]   --> src/solution/l047.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn dfs(nums: &[i32], used: &mut [bool], res: &mut Vec<Vec<i32>>, tmp: &mut Vec<i32>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/l048.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rotate`
[INFO] [stderr]   --> src/solution/l048.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn rotate(matrix: &mut Vec<Vec<i32>>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/test.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `test`
[INFO] [stderr]  --> src/solution/test.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn test() {
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `self_build`
[INFO] [stderr]  --> src/solution/test.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn self_build(mut cnt: i32, param: &mut Vec<String>) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/solution/l005.rs:58:26
[INFO] [stderr]    |
[INFO] [stderr] 58 |             .filter(|(i, c)| i >= &start && i <= &end)
[INFO] [stderr]    |                          ^ help: consider prefixing with an underscore: `_c`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/solution/l005.rs:59:20
[INFO] [stderr]    |
[INFO] [stderr] 59 |             .map(|(i, c)| c)
[INFO] [stderr]    |                    ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `v` is never read
[INFO] [stderr]   --> src/solution/l008.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let mut v = 0_i64;
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]  --> src/solution/l010.rs:9:21
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stderr]   |                     ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]  --> src/solution/l010.rs:9:32
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn is_match(s: String, p: String) -> bool {
[INFO] [stderr]   |                                ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/solution/l034.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let mut res = -1_i32;
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/solution/l034.rs:96:17
[INFO] [stderr]    |
[INFO] [stderr] 96 |         let mut res = -1_i32;
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `swap_index` is never read
[INFO] [stderr]   --> src/solution/l041.rs:50:17
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let mut swap_index = 0_i32;
[INFO] [stderr]    |                 ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l029.rs:31:27
[INFO] [stderr]    |
[INFO] [stderr] 31 |             let (mut cnt, mut mod_v) = Self::my_divide(dividend - divisor, divisor);
[INFO] [stderr]    |                           ----^^^^^
[INFO] [stderr]    |                           |
[INFO] [stderr]    |                           help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l034.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let mut res = -1_i32;
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l034.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |         let mut res = -1_i32;
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l036.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut set = HashSet::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 41 |         let mut col_set: Vec<HashSet<char>> = vec![set![]; 9];
[INFO] [stderr]    |                                                    ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l036.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut set = HashSet::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 42 |         let mut row_set: Vec<HashSet<char>> = vec![set![]; 9];
[INFO] [stderr]    |                                                    ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l036.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut set = HashSet::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 43 |         let mut square: Vec<Vec<HashSet<char>>> = vec![vec![set![]; 3]; 3];
[INFO] [stderr]    |                                                             ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l040.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut set = HashSet::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 40 |         let mut res: HashSet<Vec<i32>> = set![];
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search_range`
[INFO] [stderr]   --> src/solution/l034.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn search_range(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_left`
[INFO] [stderr]   --> src/solution/l034.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn find_left(nums: &[i32], target: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/solution/test.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution {}
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `test`
[INFO] [stderr]  --> src/solution/test.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn test() {
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `self_build`
[INFO] [stderr]  --> src/solution/test.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn self_build(mut cnt: i32, param: &mut Vec<String>) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.38s
[INFO] running `"docker" "inspect" "295e8551c3c6cbd9548f63ec5f79e263ed389f5834ea0ec717bff5cca1137ec2"`
[INFO] running `"docker" "rm" "-f" "295e8551c3c6cbd9548f63ec5f79e263ed389f5834ea0ec717bff5cca1137ec2"`
[INFO] [stdout] 295e8551c3c6cbd9548f63ec5f79e263ed389f5834ea0ec717bff5cca1137ec2