[INFO] cloning repository https://github.com/kyunghyunHan/-Algorithm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kyunghyunHan/-Algorithm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkyunghyunHan%2F-Algorithm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkyunghyunHan%2F-Algorithm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 530e2888cf9190bd7af02fd57ceb48a30f7b054f
[INFO] checking kyunghyunHan/-Algorithm against try#4c525d43052e921548191f82f6ed9e2f9e98dcb1 for pr-136988
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkyunghyunHan%2F-Algorithm" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kyunghyunHan/-Algorithm on toolchain 4c525d43052e921548191f82f6ed9e2f9e98dcb1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4c525d43052e921548191f82f6ed9e2f9e98dcb1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kyunghyunHan/-Algorithm
[INFO] finished tweaking git repo https://github.com/kyunghyunHan/-Algorithm
[INFO] tweaked toml for git repo https://github.com/kyunghyunHan/-Algorithm written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/kyunghyunHan/-Algorithm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4c525d43052e921548191f82f6ed9e2f9e98dcb1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+4c525d43052e921548191f82f6ed9e2f9e98dcb1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec84e3c4d2b7c38e67f6ac29a418fb50408aa9ec25fe3c34a22138314ec48924
[INFO] running `Command { std: "docker" "start" "-a" "ec84e3c4d2b7c38e67f6ac29a418fb50408aa9ec25fe3c34a22138314ec48924", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec84e3c4d2b7c38e67f6ac29a418fb50408aa9ec25fe3c34a22138314ec48924", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec84e3c4d2b7c38e67f6ac29a418fb50408aa9ec25fe3c34a22138314ec48924", kill_on_drop: false }`
[INFO] [stdout] ec84e3c4d2b7c38e67f6ac29a418fb50408aa9ec25fe3c34a22138314ec48924
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+4c525d43052e921548191f82f6ed9e2f9e98dcb1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02ee93c3fa3b0856bf9819ad30363b40db6a3288fd5b70d973032ccab1f433f1
[INFO] running `Command { std: "docker" "start" "-a" "02ee93c3fa3b0856bf9819ad30363b40db6a3288fd5b70d973032ccab1f433f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.161
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking algorithm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/data_structure/linked_list.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `BufReader`, `BufWriter`, `Write`, `stdin`, and `stdout`
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_3.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 |     io::{stdin, stdout, BufRead, BufReader, BufWriter, Write},
[INFO] [stdout]   |          ^^^^^  ^^^^^^  ^^^^^^^  ^^^^^^^^^  ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/conding_test/backjun/back1253.rs:28:28
[INFO] [stdout]    |
[INFO] [stdout] 28 |                         if (i != k && j != k) {
[INFO] [stdout]    |                            ^                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 28 -                         if (i != k && j != k) {
[INFO] [stdout] 28 +                         if i != k && j != k {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/data_structure/linked_list.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `BufReader`, `BufWriter`, `Write`, `stdin`, and `stdout`
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_3.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 |     io::{stdin, stdout, BufRead, BufReader, BufWriter, Write},
[INFO] [stdout]   |          ^^^^^  ^^^^^^  ^^^^^^^  ^^^^^^^^^  ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/conding_test/backjun/back1253.rs:28:28
[INFO] [stdout]    |
[INFO] [stdout] 28 |                         if (i != k && j != k) {
[INFO] [stdout]    |                            ^                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 28 -                         if (i != k && j != k) {
[INFO] [stdout] 28 +                         if i != k && j != k {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]  --> src/sort/quick.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn quick_sort(a: &mut [usize], p: &usize, r: &usize) {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 2 |     let q = partition(a, p, r);
[INFO] [stdout] 3 |     quick_sort(a, p, &(q - 1));
[INFO] [stdout]   |     -------------------------- recursive call site
[INFO] [stdout]   |
[INFO] [stdout]   = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]   = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]  --> src/sort/quick.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn quick_sort(a: &mut [usize], p: &usize, r: &usize) {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 2 |     let q = partition(a, p, r);
[INFO] [stdout] 3 |     quick_sort(a, p, &(q - 1));
[INFO] [stdout]   |     -------------------------- recursive call site
[INFO] [stdout]   |
[INFO] [stdout]   = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]   = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> src/sort/bucket.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     for i in 1..=n {}
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> src/sort/bucket.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     for i in 0..=n - 1 {}
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]  --> src/sort/bucket.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn sort(arr: &mut Vec<usize>, n: usize) {
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/sort/bucket.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let n = arr.len() - 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/sort/bucket.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let k = *arr.iter().max().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sort/bucket.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut arr: Vec<usize> = vec![16, 14, 10, 8, 7, 9, 3, 2, 4, 1];
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> src/sort/bucket.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     for i in 1..=n {}
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> src/sort/bucket.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     for i in 0..=n - 1 {}
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]  --> src/sort/bucket.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn sort(arr: &mut Vec<usize>, n: usize) {
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/sort/bucket.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let n = arr.len() - 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/sort/bucket.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let k = *arr.iter().max().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sort/bucket.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut arr: Vec<usize> = vec![16, 14, 10, 8, 7, 9, 3, 2, 4, 1];
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data_structure/queue.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut new_node = Node::new(x);
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data_structure/queue.rs:59:31
[INFO] [stdout]    |
[INFO] [stdout] 59 |         self.head.take().map(|mut head| {
[INFO] [stdout]    |                               ----^^^^
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data_structure/queue.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut new_node = Node::new(x);
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data_structure/queue.rs:59:31
[INFO] [stdout]    |
[INFO] [stdout] 59 |         self.head.take().map(|mut head| {
[INFO] [stdout]    |                               ----^^^^
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> src/graph_algorithm/breadth_first_search.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     for i in 0..10{
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> src/graph_algorithm/breadth_first_search.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     for i in 0..10{
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/backjun/back1253.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/conding_test/backjun/back1253.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 let mut find = v[k];
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a01.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/backjun/back1253.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/conding_test/backjun/back1253.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 let mut find = v[k];
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a01.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a02.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a02.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a03.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a03.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a04.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a04.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a05.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a05.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a06.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a06.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a07.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/conding_test/books/a11.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut a = [0; 100009];
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/a07.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/conding_test/books/a11.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut a = [0; 100009];
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/conding_test/books/a11.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/conding_test/books/a11.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut a = [0; 100009];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/conding_test/books/a11.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/conding_test/books/a11.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut a = [0; 100009];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/b02.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/b02.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/b03.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/conding_test/books/b03.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut reader = BufReader::new(stdin().lock());
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parent` is never used
[INFO] [stdout]   --> src/sort/heap.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn parent(i: usize) -> usize {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort` is never used
[INFO] [stdout]  --> src/sort/bucket.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn sort(arr: &mut Vec<usize>, n: usize) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HashTable` is never constructed
[INFO] [stdout]  --> src/data_structure/hash_table.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct HashTable<T> {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/data_structure/hash_table.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `get_hash_code`, `search_key`, and `put` are never used
[INFO] [stdout]   --> src/data_structure/hash_table.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<T> HashTable<T> {
[INFO] [stdout]    | -------------------- associated functions in this implementation
[INFO] [stdout] 14 |     fn get_hash_code() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 15 |     fn search_key() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 16 |     fn put() {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `size` is never used
[INFO] [stdout]   --> src/data_structure/queue.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T> Queue<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn size(&self) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example` is never used
[INFO] [stdout]  --> src/data_structure/red_black_tree.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn example(){}
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matrix_multiply` is never used
[INFO] [stdout]  --> src/divide_and_conquer/matrix_multiply.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn matrix_multiply(
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pad_matrix` is never used
[INFO] [stdout]   --> src/divide_and_conquer/matrix_multiply.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn pad_matrix(matrix: &Vec<Vec<usize>>, new_size: usize) -> Vec<Vec<usize>> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unpad_matrix` is never used
[INFO] [stdout]    --> src/divide_and_conquer/matrix_multiply.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn unpad_matrix(matrix: Vec<Vec<usize>>, original_size: usize) -> Vec<Vec<usize>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bfs` is never used
[INFO] [stdout]  --> src/graph_algorithm/breadth_first_search.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn bfs(){
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dfs` is never used
[INFO] [stdout]  --> src/graph_algorithm/depth_first_tree.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn dfs(){
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dfs_visit` is never used
[INFO] [stdout]   --> src/graph_algorithm/depth_first_tree.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn dfs_visit(){}
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution` is never used
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_1.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn solution(movie: Vec<String>) -> Vec<String> {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_1.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution` is never used
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_2.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn solution(p: String, n: i32) -> String {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_2.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `distance` is never used
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_3.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |  fn distance(x: f64, y: f64) -> f64 {
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vector_size` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_3.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |  fn vector_size(x: f64, y: f64) -> f64 {
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `inner_fn` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_3.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |  fn inner_fn(x: f64, y: f64, x1: f64, y1: f64) -> f64 {
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_3.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |  fn main() {
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution` is never used
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_5.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn solution(foods: &Vec<i32>) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_5.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/backjun/back1253.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a04.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a05.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a06.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a07.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search` is never used
[INFO] [stdout]  --> src/conding_test/books/a11.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn search(x: i32, n: i32, a: Vec<i32>) -> i32 {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/books/a11.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a16.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a08.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parent` is never used
[INFO] [stdout]   --> src/sort/heap.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn parent(i: usize) -> usize {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort` is never used
[INFO] [stdout]  --> src/sort/bucket.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn sort(arr: &mut Vec<usize>, n: usize) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HashTable` is never constructed
[INFO] [stdout]  --> src/data_structure/hash_table.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct HashTable<T> {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/data_structure/hash_table.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `get_hash_code`, `search_key`, and `put` are never used
[INFO] [stdout]   --> src/data_structure/hash_table.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<T> HashTable<T> {
[INFO] [stdout]    | -------------------- associated functions in this implementation
[INFO] [stdout] 14 |     fn get_hash_code() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 15 |     fn search_key() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 16 |     fn put() {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `size` is never used
[INFO] [stdout]   --> src/data_structure/queue.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T> Queue<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn size(&self) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example` is never used
[INFO] [stdout]  --> src/data_structure/red_black_tree.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn example(){}
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matrix_multiply` is never used
[INFO] [stdout]  --> src/divide_and_conquer/matrix_multiply.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn matrix_multiply(
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pad_matrix` is never used
[INFO] [stdout]   --> src/divide_and_conquer/matrix_multiply.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn pad_matrix(matrix: &Vec<Vec<usize>>, new_size: usize) -> Vec<Vec<usize>> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unpad_matrix` is never used
[INFO] [stdout]    --> src/divide_and_conquer/matrix_multiply.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn unpad_matrix(matrix: Vec<Vec<usize>>, original_size: usize) -> Vec<Vec<usize>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bfs` is never used
[INFO] [stdout]  --> src/graph_algorithm/breadth_first_search.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn bfs(){
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dfs` is never used
[INFO] [stdout]  --> src/graph_algorithm/depth_first_tree.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn dfs(){
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dfs_visit` is never used
[INFO] [stdout]   --> src/graph_algorithm/depth_first_tree.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn dfs_visit(){}
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution` is never used
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_1.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn solution(movie: Vec<String>) -> Vec<String> {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_1.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution` is never used
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_2.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn solution(p: String, n: i32) -> String {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_2.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `distance` is never used
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_3.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |  fn distance(x: f64, y: f64) -> f64 {
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vector_size` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_3.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |  fn vector_size(x: f64, y: f64) -> f64 {
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `inner_fn` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_3.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |  fn inner_fn(x: f64, y: f64, x1: f64, y1: f64) -> f64 {
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_3.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |  fn main() {
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution` is never used
[INFO] [stdout]  --> src/conding_test/ahrab/ahrab_5.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn solution(foods: &Vec<i32>) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/ahrab/ahrab_5.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/backjun/back1253.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a04.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a05.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a06.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a07.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search` is never used
[INFO] [stdout]  --> src/conding_test/books/a11.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn search(x: i32, n: i32, a: Vec<i32>) -> i32 {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/conding_test/books/a11.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a16.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/conding_test/books/a08.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `bubble`, `bucket`, `counting`, `data_structure`, `divide_and_conquer::matrix_multiply`, `graph_algorithm::breadth_first_search`, `heap`, `insertion`, `lotto`, `merge`, `select`, `self`, and `utils::horner`
[INFO] [stdout]  --> src/main.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     conding_test, data_structure,
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^
[INFO] [stdout] 3 |     divide_and_conquer::matrix_multiply,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     graph_algorithm::breadth_first_search,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 5 |     lotto,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 6 |     sort::{self, bubble, bucket, counting, heap, insertion, merge, select},
[INFO] [stdout]   |            ^^^^  ^^^^^^  ^^^^^^  ^^^^^^^^  ^^^^  ^^^^^^^^^  ^^^^^  ^^^^^^
[INFO] [stdout] 7 |     utils::horner,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `bubble`, `bucket`, `counting`, `data_structure`, `divide_and_conquer::matrix_multiply`, `graph_algorithm::breadth_first_search`, `heap`, `insertion`, `lotto`, `merge`, `select`, `self`, and `utils::horner`
[INFO] [stdout]  --> src/main.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     conding_test, data_structure,
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^
[INFO] [stdout] 3 |     divide_and_conquer::matrix_multiply,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     graph_algorithm::breadth_first_search,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 5 |     lotto,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 6 |     sort::{self, bubble, bucket, counting, heap, insertion, merge, select},
[INFO] [stdout]   |            ^^^^  ^^^^^^  ^^^^^^  ^^^^^^^^  ^^^^  ^^^^^^^^^  ^^^^^  ^^^^^^
[INFO] [stdout] 7 |     utils::horner,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.58s
[INFO] running `Command { std: "docker" "inspect" "02ee93c3fa3b0856bf9819ad30363b40db6a3288fd5b70d973032ccab1f433f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02ee93c3fa3b0856bf9819ad30363b40db6a3288fd5b70d973032ccab1f433f1", kill_on_drop: false }`
[INFO] [stdout] 02ee93c3fa3b0856bf9819ad30363b40db6a3288fd5b70d973032ccab1f433f1