[INFO] updating cached repository https://github.com/magurotuna/leetcode-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 25fe43e23160883aa89080d8558347f027e065a4
[INFO] checking magurotuna/leetcode-rust against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmagurotuna%2Fleetcode-rust" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/magurotuna/leetcode-rust on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/magurotuna/leetcode-rust
[INFO] finished tweaking git repo https://github.com/magurotuna/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/magurotuna/leetcode-rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/magurotuna/leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "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] 15d89d3a85b102f58f01226b1e5ac9c686ad3e38c21890d58546f99b5b864e1a
[INFO] running `"docker" "start" "-a" "15d89d3a85b102f58f01226b1e5ac9c686ad3e38c21890d58546f99b5b864e1a"`
[INFO] [stderr]     Checking leetcode-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]   --> src/bin/207.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let result = Solution::can_finish(2, vec![vec![0, 1]]);
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/7.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse`
[INFO] [stderr]  --> src/bin/7.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn reverse(x: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/bin/5.rs:110:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |             loop {}
[INFO] [stderr]     |             ------- any code following this expression is unreachable
[INFO] [stderr] 110 |             len = max(len, right - left + 1);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]    --> src/bin/5.rs:105:17
[INFO] [stderr]     |
[INFO] [stderr] 105 |         let mut len = 0;
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]    --> src/bin/5.rs:107:21
[INFO] [stderr]     |
[INFO] [stderr] 107 |             let mut left = i;
[INFO] [stderr]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]    --> src/bin/5.rs:108:21
[INFO] [stderr]     |
[INFO] [stderr] 108 |             let mut right = i;
[INFO] [stderr]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `len` is never read
[INFO] [stderr]    --> src/bin/5.rs:110:13
[INFO] [stderr]     |
[INFO] [stderr] 110 |             len = max(len, right - left + 1);
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/bin/5.rs:105:13
[INFO] [stderr]     |
[INFO] [stderr] 105 |         let mut len = 0;
[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/bin/5.rs:107:17
[INFO] [stderr]     |
[INFO] [stderr] 107 |             let mut left = i;
[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/bin/5.rs:108:17
[INFO] [stderr]     |
[INFO] [stderr] 108 |             let mut right = i;
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tmp_longest_palindrome`
[INFO] [stderr]   --> src/bin/5.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn tmp_longest_palindrome(s: String) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `maxSize` should have a snake case name
[INFO] [stderr]   --> src/bin/1381.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(maxSize: i32) -> Self {
[INFO] [stderr]    |            ^^^^^^^ help: convert the identifier to snake case: `max_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/bin/146.rs:51:23
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn put(&mut self, key: i32, value: i32) {
[INFO] [stderr]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/bin/146.rs:51:33
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn put(&mut self, key: i32, value: i32) {
[INFO] [stderr]    |                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LRUCache`
[INFO] [stderr]   --> src/bin/146.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct LRUCache {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/bin/146.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn new(capacity: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/bin/146.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn get(&mut self, key: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `put`
[INFO] [stderr]   --> src/bin/146.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn put(&mut self, key: i32, value: i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `iter`
[INFO] [stderr]   --> src/bin/394.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut iter = substr.into_iter();
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `end_index` is never read
[INFO] [stderr]   --> src/bin/394.rs:32:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |             let mut end_index = index;
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/394.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut iter = substr.into_iter();
[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: method is never used: `bfs_mle_broken_calc`
[INFO] [stderr]   --> src/bin/991.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn bfs_mle_broken_calc(x: i32, y: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]  --> src/bin/1390.rs:8:21
[INFO] [stderr]   |
[INFO] [stderr] 8 |             let mut s = 0;
[INFO] [stderr]   |                     ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cnt`
[INFO] [stderr]  --> src/bin/1390.rs:9:21
[INFO] [stderr]   |
[INFO] [stderr] 9 |             let mut cnt = 1;
[INFO] [stderr]   |                     ^^^ help: if this is intentional, prefix it with an underscore: `_cnt`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/bin/1390.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 |             let mut s = 0;
[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/bin/1390.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 |             let mut cnt = 1;
[INFO] [stderr]   |                 ----^^^
[INFO] [stderr]   |                 |
[INFO] [stderr]   |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `acc_sum` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/bin/1140.rs:13:17
[INFO] [stderr]    |
[INFO] [stderr] 12 |                 let last = acc_sum.last().unwrap();
[INFO] [stderr]    |                            ------- immutable borrow occurs here
[INFO] [stderr] 13 |                 acc_sum.push(piles[i] + last);
[INFO] [stderr]    |                 ^^^^^^^                 ---- immutable borrow later used here
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/1140.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stone_game_ii`
[INFO] [stderr]  --> src/bin/1140.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn stone_game_ii(piles: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dp`
[INFO] [stderr]   --> src/bin/1140.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn dp(
[INFO] [stderr]    |    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `width`
[INFO] [stderr]  --> src/bin/1380.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |         let width = matrix[0].len();
[INFO] [stderr]   |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_width`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/1011.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `ship_within_days`
[INFO] [stderr]  --> src/bin/1011.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn ship_within_days(weights: Vec<i32>, d: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `bfs_mle_broken_calc`
[INFO] [stderr]   --> src/bin/991.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn bfs_mle_broken_calc(x: i32, y: i32) -> i32 {
[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/bin/323.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `count_components`
[INFO] [stderr]  --> src/bin/323.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn count_components(n: i32, edges: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dfs`
[INFO] [stderr]   --> src/bin/323.rs:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn dfs(visited: &mut std::collections::HashSet<usize>, links: &Vec<Vec<usize>>, start: usize) {
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NestedIterator`
[INFO] [stderr]  --> src/bin/341.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct NestedIterator {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/bin/341.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn new(nestedList: Vec<NestedInteger>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_all`
[INFO] [stderr]   --> src/bin/341.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn push_all(&mut self, values: Vec<NestedInteger>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next`
[INFO] [stderr]   --> src/bin/341.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn next(&mut self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `has_next`
[INFO] [stderr]   --> src/bin/341.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn has_next(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `nestedList` should have a snake case name
[INFO] [stderr]   --> src/bin/341.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn new(nestedList: Vec<NestedInteger>) -> Self {
[INFO] [stderr]    |            ^^^^^^^^^^ help: convert the identifier to snake case: `nested_list`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/136.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `single_number`
[INFO] [stderr]  --> src/bin/136.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn single_number(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `bit_manipulation`
[INFO] [stderr]   --> src/bin/136.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn bit_manipulation(nums: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ExamRoom`
[INFO] [stderr]  --> src/bin/855.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct ExamRoom {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/bin/855.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(N: i32) -> Self {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `seat`
[INFO] [stderr]   --> src/bin/855.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn seat(&mut self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `leave`
[INFO] [stderr]   --> src/bin/855.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn leave(&mut self, p: i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]  --> src/bin/855.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(N: i32) -> Self {
[INFO] [stderr]   |            ^ help: convert the identifier to snake case: `n`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/67.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_binary`
[INFO] [stderr]  --> src/bin/67.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn add_binary(a: String, b: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `naive_add_binary`
[INFO] [stderr]   --> src/bin/67.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn naive_add_binary(a: String, b: String) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/bin/102.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level_order`
[INFO] [stderr]   --> src/bin/102.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn level_order(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_node`
[INFO] [stderr]   --> src/bin/102.rs:67:4
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn make_node(val: i32) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_node_with`
[INFO] [stderr]   --> src/bin/102.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn make_node_with(
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/547.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_circle_num`
[INFO] [stderr]  --> src/bin/547.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn find_circle_num(m: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/238.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `product_except_self`
[INFO] [stderr]  --> src/bin/238.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn product_except_self(nums: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `constant_space_product_except_self`
[INFO] [stderr]   --> src/bin/238.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn constant_space_product_except_self(nums: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `MOD` should have a snake case name
[INFO] [stderr]  --> src/bin/1383.rs:8:13
[INFO] [stderr]   |
[INFO] [stderr] 8 |         let MOD = 1_000_000_007;
[INFO] [stderr]   |             ^^^ help: convert the identifier to snake case: `mod`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/529.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_min_difference`
[INFO] [stderr]  --> src/bin/529.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn find_min_difference(time_points: Vec<String>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/bin/146.rs:51:23
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn put(&mut self, key: i32, value: i32) {
[INFO] [stderr]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/bin/146.rs:51:33
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn put(&mut self, key: i32, value: i32) {
[INFO] [stderr]    |                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LRUCache`
[INFO] [stderr]   --> src/bin/146.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct LRUCache {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/bin/146.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn new(capacity: i32) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/bin/146.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn get(&mut self, key: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `put`
[INFO] [stderr]   --> src/bin/146.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn put(&mut self, key: i32, value: i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]   --> src/bin/6.rs:20:50
[INFO] [stderr]    |
[INFO] [stderr] 20 |                     if let Some(&cn) = chars.get((cur_r + (room_in_block as usize) - 2 * r)) {
[INFO] [stderr]    |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n_blocks`
[INFO] [stderr]   --> src/bin/6.rs:10:13
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let n_blocks = chars.len() as i32 / room_in_block;
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n_blocks`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/bin/103.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `zigzag_level_order`
[INFO] [stderr]   --> src/bin/103.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn zigzag_level_order(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_node`
[INFO] [stderr]   --> src/bin/103.rs:78:4
[INFO] [stderr]    |
[INFO] [stderr] 78 | fn make_node(val: i32) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_node_with`
[INFO] [stderr]   --> src/bin/103.rs:82:4
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn make_node_with(
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/929.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_unique_emails`
[INFO] [stderr]   --> src/bin/929.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn num_unique_emails(emails: Vec<String>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/15.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `three_sum`
[INFO] [stderr]  --> src/bin/15.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn three_sum(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tle_three_sum`
[INFO] [stderr]   --> src/bin/15.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn tle_three_sum(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/695.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_area_of_island`
[INFO] [stderr]  --> src/bin/695.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_area_of_island(grid: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dfs`
[INFO] [stderr]   --> src/bin/695.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn dfs(
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/1048.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_str_chain`
[INFO] [stderr]  --> src/bin/1048.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn longest_str_chain(words: Vec<String>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `dp_longest_str_chain`
[INFO] [stderr]   --> src/bin/1048.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn dp_longest_str_chain(words: Vec<String>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dfs`
[INFO] [stderr]   --> src/bin/1048.rs:62:4
[INFO] [stderr]    |
[INFO] [stderr] 62 | fn dfs(
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_chain`
[INFO] [stderr]   --> src/bin/1048.rs:85:4
[INFO] [stderr]    |
[INFO] [stderr] 85 | fn is_chain(prev: &[char], next: &[char]) -> bool {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `bfs_coin_change`
[INFO] [stderr]   --> src/bin/322.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn bfs_coin_change(coins: Vec<i32>, amount: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/50.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let mut even_n = if is_odd { n - 1 } else { n };
[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: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/973.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `k_closest`
[INFO] [stderr]  --> src/bin/973.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn k_closest(points: Vec<Vec<i32>>, k: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/bin/253.rs:29:14
[INFO] [stderr]    |
[INFO] [stderr] 29 |         for (key, (start, end)) in m.into_iter() {
[INFO] [stderr]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/bin/2.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     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/bin/2.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_two_numbers`
[INFO] [stderr]   --> src/bin/2.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | /     pub fn add_two_numbers(
[INFO] [stderr] 19 | |         l1: Option<Box<ListNode>>,
[INFO] [stderr] 20 | |         l2: Option<Box<ListNode>>,
[INFO] [stderr] 21 | |     ) -> Option<Box<ListNode>> {
[INFO] [stderr] ...  |
[INFO] [stderr] 51 | |         Some(ans_root)
[INFO] [stderr] 52 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `recursive_add_two_numbers`
[INFO] [stderr]   --> src/bin/2.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 | /     pub fn recursive_add_two_numbers(
[INFO] [stderr] 55 | |         l1: Option<Box<ListNode>>,
[INFO] [stderr] 56 | |         l2: Option<Box<ListNode>>,
[INFO] [stderr] 57 | |     ) -> Option<Box<ListNode>> {
[INFO] [stderr] 58 | |         Solution::solve(l1.as_ref(), l2.as_ref(), 0)
[INFO] [stderr] 59 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `solve`
[INFO] [stderr]   --> src/bin/2.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 | /     fn solve(
[INFO] [stderr] 62 | |         node1: Option<&Box<ListNode>>,
[INFO] [stderr] 63 | |         node2: Option<&Box<ListNode>>,
[INFO] [stderr] 64 | |         carry_up: i32,
[INFO] [stderr] ...  |
[INFO] [stderr] 79 | |         Some(node)
[INFO] [stderr] 80 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/33.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search`
[INFO] [stderr]  --> src/bin/33.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn search(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/1374.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `generate_the_string`
[INFO] [stderr]  --> src/bin/1374.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn generate_the_string(n: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `size`
[INFO] [stderr]  --> src/bin/348.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     size: usize,
[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/bin/1404.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_steps`
[INFO] [stderr]  --> src/bin/1404.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn num_steps(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `valley` is never read
[INFO] [stderr]  --> src/bin/122.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 |         let mut valley = prices[0];
[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: value assigned to `peek` is never read
[INFO] [stderr]   --> src/bin/122.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut peek = prices[0];
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `valley` is never read
[INFO] [stderr]   --> src/bin/122.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             valley = peek;
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]  --> src/bin/855.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(N: i32) -> Self {
[INFO] [stderr]   |            ^ help: convert the identifier to snake case: `n`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/122.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_profit`
[INFO] [stderr]  --> src/bin/122.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `simplest_max_profit`
[INFO] [stderr]   --> src/bin/122.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn simplest_max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `brute_force_max_profit`
[INFO] [stderr]   --> src/bin/122.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn brute_force_max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calc`
[INFO] [stderr]   --> src/bin/122.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn calc(prices: &[i32], s: usize) -> i32 {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/227.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `calculate`
[INFO] [stderr]  --> src/bin/227.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn calculate(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calc`
[INFO] [stderr]   --> src/bin/227.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn calc(s: &[char], index: &mut usize) -> i32 {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_and_calc_high_precedence`
[INFO] [stderr]   --> src/bin/227.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn read_and_calc_high_precedence(s: &[char], index: &mut usize) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_val`
[INFO] [stderr]   --> src/bin/227.rs:59:4
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn read_val(s: &[char], index: &mut usize) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/621.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `least_interval`
[INFO] [stderr]  --> src/bin/621.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn least_interval(tasks: Vec<char>, n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `letter_to_index`
[INFO] [stderr]   --> src/bin/621.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn letter_to_index(c: char) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sort_counts`
[INFO] [stderr]   --> src/bin/621.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn sort_counts(task_counts: &[i32]) -> Vec<(usize, i32)> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `bfs_coin_change`
[INFO] [stderr]   --> src/bin/322.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn bfs_coin_change(coins: Vec<i32>, amount: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]   --> src/bin/207.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let result = Solution::can_finish(2, vec![vec![0, 1]]);
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/200.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_islands`
[INFO] [stderr]  --> src/bin/200.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn num_islands(grid: Vec<Vec<char>>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mark_island`
[INFO] [stderr]   --> src/bin/200.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn mark_island(marker: &mut Vec<Vec<char>>, h: usize, w: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/49.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `group_anagrams`
[INFO] [stderr]  --> src/bin/49.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn group_anagrams(strs: Vec<String>) -> Vec<Vec<String>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::min`
[INFO] [stderr]  --> src/bin/76.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::min;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/bin/76.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let mut t_count = t.chars().fold(HashMap::new(), |mut acc, ch| {
[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: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/1397.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_good_strings`
[INFO] [stderr]  --> src/bin/1397.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn find_good_strings(n: i32, s1: String, s2: String, evil: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `MOD` should have a snake case name
[INFO] [stderr]  --> src/bin/1397.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let MOD = 1_000_000_007;
[INFO] [stderr]   |             ^^^ help: convert the identifier to snake case: `mod`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/bin/445.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/bin/445.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_two_numbers`
[INFO] [stderr]   --> src/bin/445.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] 44 | |         make_linked_list(0, &digits)
[INFO] [stderr] 45 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_linked_list`
[INFO] [stderr]   --> src/bin/445.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn make_linked_list(index: usize, digits: &[i32]) -> Option<Box<ListNode>> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `traverse`
[INFO] [stderr]   --> src/bin/445.rs:59:4
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn traverse(node: Option<&Box<ListNode>>, val: &mut Vec<i32>) {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `next_max`
[INFO] [stderr]   --> src/bin/53.rs:33:17
[INFO] [stderr]    |
[INFO] [stderr] 33 |             let next_max = max(cur.0, sum);
[INFO] [stderr]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_max`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/1234.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `balanced_string`
[INFO] [stderr]  --> src/bin/1234.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn balanced_string(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cur_right_ok`
[INFO] [stderr]   --> src/bin/1234.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn cur_right_ok(counts: &[i32], len: usize) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `next_right_ng`
[INFO] [stderr]   --> src/bin/1234.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn next_right_ng(counts: &[i32], next_char: char, len: usize) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `char_to_index`
[INFO] [stderr]   --> src/bin/1234.rs:62:4
[INFO] [stderr]    |
[INFO] [stderr] 62 | fn char_to_index(c: char) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/1405.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `longest_diverse_string`
[INFO] [stderr]  --> src/bin/1405.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn longest_diverse_string(a: i32, b: i32, c: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tle_longest_diverse_string`
[INFO] [stderr]   --> src/bin/1405.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn tle_longest_diverse_string(a: i32, b: i32, c: i32) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `helper`
[INFO] [stderr]   --> src/bin/1405.rs:96:4
[INFO] [stderr]    |
[INFO] [stderr] 96 | fn helper(one: char, two: char, ret: &mut Vec<char>, a: i32, b: i32, c: i32) {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dfs`
[INFO] [stderr]    --> src/bin/1405.rs:103:4
[INFO] [stderr]     |
[INFO] [stderr] 103 | fn dfs(
[INFO] [stderr]     |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/210.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_order`
[INFO] [stderr]  --> src/bin/210.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn find_order(num_courses: i32, prerequisites: Vec<Vec<i32>>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/735.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `asteroid_collision`
[INFO] [stderr]  --> src/bin/735.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn asteroid_collision(asteroids: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search`
[INFO] [stderr]   --> src/bin/208.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     fn search(&self, word: String) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `starts_with`
[INFO] [stderr]   --> src/bin/208.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn starts_with(&self, prefix: String) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/bin/22.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/bin/201.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/201.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `range_bitwise_and`
[INFO] [stderr]  --> src/bin/201.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn range_bitwise_and(m: i32, n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `naive_range_bitwise_and`
[INFO] [stderr]   --> src/bin/201.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn naive_range_bitwise_and(m: i32, n: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/881.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_rescue_boats`
[INFO] [stderr]  --> src/bin/881.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn num_rescue_boats(people: Vec<i32>, limit: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/20.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid`
[INFO] [stderr]  --> src/bin/20.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn is_valid(s: String) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_close`
[INFO] [stderr]   --> src/bin/20.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn is_close(c: char) -> bool {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_open`
[INFO] [stderr]   --> src/bin/20.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn is_open(c: char) -> bool {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `close`
[INFO] [stderr]   --> src/bin/20.rs:46:4
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn close(b: char) -> char {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `valley` is never read
[INFO] [stderr]  --> src/bin/122.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 |         let mut valley = prices[0];
[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: value assigned to `peek` is never read
[INFO] [stderr]   --> src/bin/122.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut peek = prices[0];
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `valley` is never read
[INFO] [stderr]   --> src/bin/122.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             valley = peek;
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/494.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_target_sum_ways`
[INFO] [stderr]  --> src/bin/494.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn find_target_sum_ways(nums: Vec<i32>, s: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `dp_find_target_sum_ways`
[INFO] [stderr]   --> src/bin/494.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn dp_find_target_sum_ways(nums: Vec<i32>, s: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dfs`
[INFO] [stderr]   --> src/bin/494.rs:36:4
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn dfs(nums: &[i32], rest: i32) -> i32 {
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `iter`
[INFO] [stderr]   --> src/bin/394.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut iter = substr.into_iter();
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `end_index` is never read
[INFO] [stderr]   --> src/bin/394.rs:32:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |             let mut end_index = index;
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/394.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut iter = substr.into_iter();
[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: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/394.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `decode_string`
[INFO] [stderr]  --> src/bin/394.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn decode_string(s: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]   --> src/bin/394.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn solve(ans: &mut String, substr: &[char]) {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `1406`
[INFO] [stderr]  --> src/bin/1406.rs:1:9
[INFO] [stderr]   |
[INFO] [stderr] 1 | // TODO
[INFO] [stderr]   |         ^ consider adding a `main` function to `src/bin/1406.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: could not compile `leetcode-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: method is never used: `factorial`
[INFO] [stderr]   --> src/bin/62.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn factorial(n: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/bin/779.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         x => {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/779.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `kth_grammar`
[INFO] [stderr]  --> src/bin/779.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn kth_grammar(n: i32, k: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]   --> src/bin/779.rs:15:4
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn solve(row: i32, col: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `math_unique_paths`
[INFO] [stderr]   --> src/bin/62.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn math_unique_paths(m: i32, n: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `factorial`
[INFO] [stderr]   --> src/bin/62.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn factorial(n: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/31.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_permutation`
[INFO] [stderr]  --> src/bin/31.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn next_permutation(nums: &mut Vec<i32>) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/34.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search_range`
[INFO] [stderr]  --> src/bin/34.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn search_range(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/986.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `interval_intersection`
[INFO] [stderr]  --> src/bin/986.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn interval_intersection(a: Vec<Vec<i32>>, b: Vec<Vec<i32>>) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/bin/215.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_kth_largest`
[INFO] [stderr]  --> src/bin/215.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn find_kth_largest(nums: Vec<i32>, k: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `max`
[INFO] [stderr]   --> src/bin/1130.rs:24:20
[INFO] [stderr]    |
[INFO] [stderr] 24 |     use std::cmp::{max, min};
[INFO] [stderr]    |                    ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_open`
[INFO] [stderr]   --> src/bin/20.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn is_open(c: char) -> bool {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "15d89d3a85b102f58f01226b1e5ac9c686ad3e38c21890d58546f99b5b864e1a"`
[INFO] running `"docker" "rm" "-f" "15d89d3a85b102f58f01226b1e5ac9c686ad3e38c21890d58546f99b5b864e1a"`
[INFO] [stdout] 15d89d3a85b102f58f01226b1e5ac9c686ad3e38c21890d58546f99b5b864e1a
