[INFO] updating cached repository https://github.com/virct/leetcode-rs
[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] [stderr] From https://github.com/virct/leetcode-rs
[INFO] [stderr]    e576483..ecb5a98  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ecb5a98e82506422a64b00ff66668bd0be43b614
[INFO] checking virct/leetcode-rs against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvirct%2Fleetcode-rs" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/virct/leetcode-rs on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/virct/leetcode-rs
[INFO] finished tweaking git repo https://github.com/virct/leetcode-rs
[INFO] tweaked toml for git repo https://github.com/virct/leetcode-rs written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/virct/leetcode-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "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] fc905194dc52c4c30056a91bec4102f846144a3c8a76f357e1ff18e2e5b10810
[INFO] running `"docker" "start" "-a" "fc905194dc52c4c30056a91bec4102f846144a3c8a76f357e1ff18e2e5b10810"`
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]  --> src/leetcode/longest_palindrome.rs:5:31
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn longest_palindrome(s: String) -> String {
[INFO] [stderr]   |                               ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 |             let left = Self::help(left,v-1,res);
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_left`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 |             let right = Self::help(v+1,right,res);
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_right`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str1`
[INFO] [stderr]  --> src/leetcode/gcd_of_strings.rs:4:27
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn gcd_of_strings(str1: String, str2: String) -> String {
[INFO] [stderr]   |                           ^^^^ help: consider prefixing with an underscore: `_str1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str2`
[INFO] [stderr]  --> src/leetcode/gcd_of_strings.rs:4:41
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn gcd_of_strings(str1: String, str2: String) -> String {
[INFO] [stderr]   |                                         ^^^^ help: consider prefixing with an underscore: `_str2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]  --> src/offer/two_sum2.rs:5:20
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn two_sum(n: i32) -> Vec<f64> {
[INFO] [stderr]   |                    ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: function cannot return without recursing
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn help(left:i32,right:i32,res:&mut Vec<Option<Rc<RefCell<TreeNode>>>>)->Rc<RefCell<TreeNode>>{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stderr] ...
[INFO] [stderr] 43 |             let left = Self::help(left,v-1,res);
[INFO] [stderr]    |                        ------------------------ recursive call site
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stderr]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |             let mut root = Rc::new(RefCell::new(TreeNode::new(v)));
[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: cannot borrow `self.mins` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/offer/min_stack.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |         if let Some(min) = self.mins.back(){
[INFO] [stderr]    |                            --------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 26 |                 self.mins.push_back(*min);
[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: variable does not need to be mutable
[INFO] [stderr]  --> src/offer/sum_nums.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn sum_nums(mut n: i32) -> i32 {
[INFO] [stderr]   |                     ----^
[INFO] [stderr]   |                     |
[INFO] [stderr]   |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/generate_trees.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | 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_trees`
[INFO] [stderr]  --> src/leetcode/generate_trees.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn generate_trees(n: i32) -> Vec<Option<Rc<RefCell<TreeNode>>>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:30:2
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn add(root :&Option<Rc<RefCell<TreeNode>>>,v:i32)->Option<Rc<RefCell<TreeNode>>>{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn help(left:i32,right:i32,res:&mut Vec<Option<Rc<RefCell<TreeNode>>>>)->Rc<RefCell<TreeNode>>{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/can_three_parts_equal_sum.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `can_three_parts_equal_sum`
[INFO] [stderr]  --> src/leetcode/can_three_parts_equal_sum.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn can_three_parts_equal_sum(a: Vec<i32>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `can_three_parts_equal_sum2`
[INFO] [stderr]   --> src/leetcode/can_three_parts_equal_sum.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn can_three_parts_equal_sum2(a: Vec<i32>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/num_trees.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_trees`
[INFO] [stderr]  --> src/leetcode/num_trees.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn num_trees(n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/leetcode/num_trees.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn help(start:i32,end:i32) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/is_valid_bst.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid_bst`
[INFO] [stderr]  --> src/leetcode/is_valid_bst.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn is_valid_bst(root: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/leetcode/is_valid_bst.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn help(root :&Option<Rc<RefCell<TreeNode>>>,low :Option<i32>, upper :Option<i32>)->bool{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/gcd_of_strings.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gcd_of_strings`
[INFO] [stderr]  --> src/leetcode/gcd_of_strings.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn gcd_of_strings(str1: String, str2: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/length_of_lis.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `length_of_lis`
[INFO] [stderr]  --> src/leetcode/length_of_lis.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn length_of_lis(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/level_order.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level_order`
[INFO] [stderr]  --> src/leetcode/level_order.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn level_order(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/spiral_order.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution;
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `spiral_order`
[INFO] [stderr]  --> src/offer/spiral_order.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn spiral_order(matrix: Vec<Vec<i32>>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MinStack`
[INFO] [stderr]  --> src/offer/min_stack.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct MinStack {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/min_stack.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/offer/min_stack.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn push(&mut self, x: i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/offer/min_stack.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn pop(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `top`
[INFO] [stderr]   --> src/offer/min_stack.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn top(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `min`
[INFO] [stderr]   --> src/offer/min_stack.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn min(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/validate_stack_sequences.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution;
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `validate_stack_sequences`
[INFO] [stderr]  --> src/offer/validate_stack_sequences.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn validate_stack_sequences(pushed: Vec<i32>, mut popped: Vec<i32>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/level_order.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/level_order.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level_order`
[INFO] [stderr]   --> src/offer/level_order.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn level_order(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/level_order.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn help(arr:Vec<Option<Rc<RefCell<TreeNode>>>>,res:&mut Vec<i32>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/level_order2.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/level_order2.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level_order`
[INFO] [stderr]   --> src/offer/level_order2.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn level_order(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/level_order2.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn help(arr:Vec<Option<Rc<RefCell<TreeNode>>>>,res:&mut Vec<Vec<i32>>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/level_order3.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/level_order3.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level_order`
[INFO] [stderr]   --> src/offer/level_order3.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn level_order(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/level_order3.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn help(arr:Vec<Option<Rc<RefCell<TreeNode>>>>,step :i32,res:&mut Vec<Vec<i32>>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/verify_postorder.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution;
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `verify_postorder`
[INFO] [stderr]  --> src/offer/verify_postorder.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn verify_postorder(postorder: Vec<i32>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]  --> src/offer/verify_postorder.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn help(start:i32,end:i32,postorder :&Vec<i32>)->bool{
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_idx`
[INFO] [stderr]   --> src/offer/verify_postorder.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn max_idx(v :&[i32],root:i32)->usize{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/path_sum.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/path_sum.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `path_sum`
[INFO] [stderr]   --> src/offer/path_sum.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn path_sum(root: Option<Rc<RefCell<TreeNode>>>, sum: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/path_sum.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn help(root: &Option<Rc<RefCell<TreeNode>>>,sum :i32,mut crumbs:Vec<i32>,mut res: &mut Vec<Vec<i32>>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `TreeNode`
[INFO] [stderr]  --> src/offer/codec.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct TreeNode {
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/codec.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/codec.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `codec`
[INFO] [stderr]   --> src/offer/codec.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn codec(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/permutation.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `permutation`
[INFO] [stderr]  --> src/offer/permutation.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn permutation(s: String) -> Vec<String> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/permutation.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn help(cs:&Vec<char>,s:String,res:&mut std::collections::HashSet<String>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/majority_element.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `majority_element`
[INFO] [stderr]  --> src/offer/majority_element.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/get_least_numbers.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution;
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_least_numbers`
[INFO] [stderr]  --> src/offer/get_least_numbers.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn get_least_numbers(mut arr: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `quick_sort2`
[INFO] [stderr]   --> src/offer/get_least_numbers.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn quick_sort2(k :usize,left:usize,right:usize,arr: &mut Vec<i32>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `quick_sort`
[INFO] [stderr]   --> src/offer/get_least_numbers.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn quick_sort(left:usize,right:usize,arr: &mut Vec<i32>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MedianFinder`
[INFO] [stderr]  --> src/offer/median_finder.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct MedianFinder {
[INFO] [stderr]   |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/median_finder.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_num`
[INFO] [stderr]   --> src/offer/median_finder.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn add_num(&mut self, num: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_median`
[INFO] [stderr]   --> src/offer/median_finder.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn find_median(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/max_sub_array.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_sub_array`
[INFO] [stderr]  --> src/offer/max_sub_array.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/find_nth_digit.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution;
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_nth_digit`
[INFO] [stderr]  --> src/offer/find_nth_digit.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn find_nth_digit(n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/min_number.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution;
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `min_number`
[INFO] [stderr]  --> src/offer/min_number.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn min_number(mut nums: Vec<i32>) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `varient_quick_sort`
[INFO] [stderr]  --> src/offer/min_number.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn varient_quick_sort(start :usize,end :usize,nums :&mut Vec<i32>){
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `compare2`
[INFO] [stderr]   --> src/offer/min_number.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn compare2(origin :i32 , other :i32) -> bool{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `compare`
[INFO] [stderr]   --> src/offer/min_number.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn compare(origin :i32 , other :i32)->bool{//该合并的 , 写半天写的什么东西。简直多此一举
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/translate_num.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `translate_num`
[INFO] [stderr]  --> src/offer/translate_num.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn translate_num(num: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/max_value.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_value`
[INFO] [stderr]  --> src/offer/max_value.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_value(grid: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/max_value.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn help(sum:i32,i : usize, j : usize ,i_max :usize, j_max :usize, grid :&Vec<Vec<i32>>)->i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/length_of_longest_substring.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `length_of_longest_substring`
[INFO] [stderr]  --> src/offer/length_of_longest_substring.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/nth_ugly_number.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `nth_ugly_number`
[INFO] [stderr]  --> src/offer/nth_ugly_number.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn nth_ugly_number(n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/first_uniq_char.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `first_uniq_char`
[INFO] [stderr]  --> src/offer/first_uniq_char.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn first_uniq_char(s: String) -> char {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/missing_number.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `missing_number`
[INFO] [stderr]  --> src/offer/missing_number.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn missing_number(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/max_depth.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/max_depth.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_depth`
[INFO] [stderr]   --> src/offer/max_depth.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn max_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/max_depth.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn help(node: &Option<Rc<RefCell<TreeNode>>>,step :i32)->i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/is_balanced.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/is_balanced.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_balanced`
[INFO] [stderr]   --> src/offer/is_balanced.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn is_balanced(root: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/is_balanced.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn help(node :&Option<Rc<RefCell<TreeNode>>>,step :&mut i32)->bool{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help2`
[INFO] [stderr]   --> src/offer/is_balanced.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn help2(node  :&Option<Rc<RefCell<TreeNode>>>,flag :&mut bool) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/single_numbers.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `single_numbers`
[INFO] [stderr]  --> src/offer/single_numbers.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn single_numbers(nums: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_single_numbers_by_xor`
[INFO] [stderr]   --> src/offer/single_numbers.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn get_single_numbers_by_xor(nums: Vec<i32>)->Vec<i32>{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/two_sum.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]  --> src/offer/two_sum.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `binary_search`
[INFO] [stderr]   --> src/offer/two_sum.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn binary_search(nums :&Vec<i32>, max : i32)->usize{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/find_continuous_sequence.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution;
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_continuous_sequence`
[INFO] [stderr]  --> src/offer/find_continuous_sequence.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn find_continuous_sequence(target: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/reverse_words.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse_words`
[INFO] [stderr]  --> src/offer/reverse_words.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn reverse_words(s: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/reverse_left_words.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse_left_words`
[INFO] [stderr]  --> src/offer/reverse_left_words.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn reverse_left_words(s: String, n: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/max_sliding_window.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_sliding_window`
[INFO] [stderr]  --> src/offer/max_sliding_window.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn max_sliding_window(nums: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max`
[INFO] [stderr]   --> src/offer/max_sliding_window.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn max(nums :&[i32]) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/two_sum2.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]  --> src/offer/two_sum2.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn two_sum(n: i32) -> Vec<f64> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/is_straight.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_straight`
[INFO] [stderr]  --> src/offer/is_straight.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn is_straight(mut nums: Vec<i32>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `quick_sort_rev`
[INFO] [stderr]   --> src/offer/is_straight.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn quick_sort_rev(left :usize,right :usize,nums :&mut Vec<i32>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/last_remaining.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_remaining`
[INFO] [stderr]  --> src/offer/last_remaining.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn last_remaining(n: i32, m: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/max_profit.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_profit`
[INFO] [stderr]  --> src/offer/max_profit.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/sum_nums.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum_nums`
[INFO] [stderr]  --> src/offer/sum_nums.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn sum_nums(mut n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/sum_nums.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn help(res:&mut i32,mut n:i32)->bool{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/add.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]  --> src/offer/add.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn add(mut a: i32,mut b: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/construct_arr.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `construct_arr`
[INFO] [stderr]  --> src/offer/construct_arr.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn construct_arr(a: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]  --> src/leetcode/longest_palindrome.rs:5:31
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn longest_palindrome(s: String) -> String {
[INFO] [stderr]   |                               ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 |             let left = Self::help(left,v-1,res);
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_left`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 |             let right = Self::help(v+1,right,res);
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_right`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str1`
[INFO] [stderr]  --> src/leetcode/gcd_of_strings.rs:4:27
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn gcd_of_strings(str1: String, str2: String) -> String {
[INFO] [stderr]   |                           ^^^^ help: consider prefixing with an underscore: `_str1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str2`
[INFO] [stderr]  --> src/leetcode/gcd_of_strings.rs:4:41
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn gcd_of_strings(str1: String, str2: String) -> String {
[INFO] [stderr]   |                                         ^^^^ help: consider prefixing with an underscore: `_str2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]  --> src/offer/two_sum2.rs:5:20
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn two_sum(n: i32) -> Vec<f64> {
[INFO] [stderr]   |                    ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: function cannot return without recursing
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn help(left:i32,right:i32,res:&mut Vec<Option<Rc<RefCell<TreeNode>>>>)->Rc<RefCell<TreeNode>>{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stderr] ...
[INFO] [stderr] 43 |             let left = Self::help(left,v-1,res);
[INFO] [stderr]    |                        ------------------------ recursive call site
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stderr]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |             let mut root = Rc::new(RefCell::new(TreeNode::new(v)));
[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: cannot borrow `self.mins` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/offer/min_stack.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |         if let Some(min) = self.mins.back(){
[INFO] [stderr]    |                            --------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 26 |                 self.mins.push_back(*min);
[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: variable does not need to be mutable
[INFO] [stderr]  --> src/offer/sum_nums.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn sum_nums(mut n: i32) -> i32 {
[INFO] [stderr]   |                     ----^
[INFO] [stderr]   |                     |
[INFO] [stderr]   |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/leetcode/generate_trees.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn help(left:i32,right:i32,res:&mut Vec<Option<Rc<RefCell<TreeNode>>>>)->Rc<RefCell<TreeNode>>{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `can_three_parts_equal_sum2`
[INFO] [stderr]   --> src/leetcode/can_three_parts_equal_sum.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn can_three_parts_equal_sum2(a: Vec<i32>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/leetcode/num_trees.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn help(start:i32,end:i32) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/is_valid_bst.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid_bst`
[INFO] [stderr]  --> src/leetcode/is_valid_bst.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn is_valid_bst(root: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/leetcode/is_valid_bst.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn help(root :&Option<Rc<RefCell<TreeNode>>>,low :Option<i32>, upper :Option<i32>)->bool{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/leetcode/gcd_of_strings.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gcd_of_strings`
[INFO] [stderr]  --> src/leetcode/gcd_of_strings.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn gcd_of_strings(str1: String, str2: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MinStack`
[INFO] [stderr]  --> src/offer/min_stack.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct MinStack {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/min_stack.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/offer/min_stack.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn push(&mut self, x: i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/offer/min_stack.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn pop(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `top`
[INFO] [stderr]   --> src/offer/min_stack.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn top(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `min`
[INFO] [stderr]   --> src/offer/min_stack.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn min(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/level_order.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/level_order2.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/level_order3.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/path_sum.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/path_sum.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `path_sum`
[INFO] [stderr]   --> src/offer/path_sum.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn path_sum(root: Option<Rc<RefCell<TreeNode>>>, sum: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/path_sum.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn help(root: &Option<Rc<RefCell<TreeNode>>>,sum :i32,mut crumbs:Vec<i32>,mut res: &mut Vec<Vec<i32>>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `TreeNode`
[INFO] [stderr]  --> src/offer/codec.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct TreeNode {
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/codec.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/codec.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `codec`
[INFO] [stderr]   --> src/offer/codec.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn codec(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/permutation.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `permutation`
[INFO] [stderr]  --> src/offer/permutation.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn permutation(s: String) -> Vec<String> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/permutation.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn help(cs:&Vec<char>,s:String,res:&mut std::collections::HashSet<String>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/majority_element.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `majority_element`
[INFO] [stderr]  --> src/offer/majority_element.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/get_least_numbers.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Solution;
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_least_numbers`
[INFO] [stderr]  --> src/offer/get_least_numbers.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn get_least_numbers(mut arr: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `quick_sort2`
[INFO] [stderr]   --> src/offer/get_least_numbers.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn quick_sort2(k :usize,left:usize,right:usize,arr: &mut Vec<i32>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `quick_sort`
[INFO] [stderr]   --> src/offer/get_least_numbers.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn quick_sort(left:usize,right:usize,arr: &mut Vec<i32>){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MedianFinder`
[INFO] [stderr]  --> src/offer/median_finder.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct MedianFinder {
[INFO] [stderr]   |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/median_finder.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_num`
[INFO] [stderr]   --> src/offer/median_finder.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn add_num(&mut self, num: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_median`
[INFO] [stderr]   --> src/offer/median_finder.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn find_median(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/max_sub_array.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_sub_array`
[INFO] [stderr]  --> src/offer/max_sub_array.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn max_sub_array(nums: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/translate_num.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `translate_num`
[INFO] [stderr]  --> src/offer/translate_num.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     pub fn translate_num(num: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/max_value.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_value`
[INFO] [stderr]  --> src/offer/max_value.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_value(grid: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/max_value.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn help(sum:i32,i : usize, j : usize ,i_max :usize, j_max :usize, grid :&Vec<Vec<i32>>)->i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/length_of_longest_substring.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `length_of_longest_substring`
[INFO] [stderr]  --> src/offer/length_of_longest_substring.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/nth_ugly_number.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `nth_ugly_number`
[INFO] [stderr]  --> src/offer/nth_ugly_number.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn nth_ugly_number(n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/first_uniq_char.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `first_uniq_char`
[INFO] [stderr]  --> src/offer/first_uniq_char.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn first_uniq_char(s: String) -> char {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/max_depth.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/max_depth.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_depth`
[INFO] [stderr]   --> src/offer/max_depth.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn max_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/max_depth.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn help(node: &Option<Rc<RefCell<TreeNode>>>,step :i32)->i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/offer/is_balanced.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn new(val: i32) -> Self {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/offer/is_balanced.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct Solution;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_balanced`
[INFO] [stderr]   --> src/offer/is_balanced.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn is_balanced(root: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/is_balanced.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn help(node :&Option<Rc<RefCell<TreeNode>>>,step :&mut i32)->bool{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help2`
[INFO] [stderr]   --> src/offer/is_balanced.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn help2(node  :&Option<Rc<RefCell<TreeNode>>>,flag :&mut bool) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/single_numbers.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `single_numbers`
[INFO] [stderr]  --> src/offer/single_numbers.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn single_numbers(nums: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_single_numbers_by_xor`
[INFO] [stderr]   --> src/offer/single_numbers.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn get_single_numbers_by_xor(nums: Vec<i32>)->Vec<i32>{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]  --> src/offer/two_sum.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/reverse_words.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse_words`
[INFO] [stderr]  --> src/offer/reverse_words.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn reverse_words(s: String) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/reverse_left_words.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse_left_words`
[INFO] [stderr]  --> src/offer/reverse_left_words.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn reverse_left_words(s: String, n: i32) -> String {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/max_sliding_window.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_sliding_window`
[INFO] [stderr]  --> src/offer/max_sliding_window.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn max_sliding_window(nums: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max`
[INFO] [stderr]   --> src/offer/max_sliding_window.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn max(nums :&[i32]) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/two_sum2.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]  --> src/offer/two_sum2.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn two_sum(n: i32) -> Vec<f64> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_straight`
[INFO] [stderr]  --> src/offer/is_straight.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn is_straight(mut nums: Vec<i32>) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/last_remaining.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last_remaining`
[INFO] [stderr]  --> src/offer/last_remaining.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn last_remaining(n: i32, m: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/max_profit.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `max_profit`
[INFO] [stderr]  --> src/offer/max_profit.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn max_profit(prices: Vec<i32>) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/sum_nums.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum_nums`
[INFO] [stderr]  --> src/offer/sum_nums.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn sum_nums(mut n: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `help`
[INFO] [stderr]   --> src/offer/sum_nums.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn help(res:&mut i32,mut n:i32)->bool{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/add.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]  --> src/offer/add.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn add(mut a: i32,mut b: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/offer/construct_arr.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `construct_arr`
[INFO] [stderr]  --> src/offer/construct_arr.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn construct_arr(a: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.71s
[INFO] running `"docker" "inspect" "fc905194dc52c4c30056a91bec4102f846144a3c8a76f357e1ff18e2e5b10810"`
[INFO] running `"docker" "rm" "-f" "fc905194dc52c4c30056a91bec4102f846144a3c8a76f357e1ff18e2e5b10810"`
[INFO] [stdout] fc905194dc52c4c30056a91bec4102f846144a3c8a76f357e1ff18e2e5b10810