feat: add solutions to lc problem: No.2360 (doocs#4298)

No.2360.Longest Cycle in a Graph

Author: yanglbme

solution/2300-2399/2360.Longest Cycle in a Graph/README.md

@@ -208,23 +208,23 @@ func longestCycle(edges []int) int {
 ```ts
 function longestCycle(edges: number[]): number {
     const n = edges.length;
-    const vis = new Array(n).fill(false);
+    const vis: boolean[] = Array(n).fill(false);
     let ans = -1;
     for (let i = 0; i < n; ++i) {
         if (vis[i]) {
             continue;
         }
         let j = i;
         const cycle: number[] = [];
-        for (; j != -1 && !vis[j]; j = edges[j]) {
+        for (; j !== -1 && !vis[j]; j = edges[j]) {
             vis[j] = true;
             cycle.push(j);
         }
-        if (j == -1) {
+        if (j === -1) {
             continue;
         }
         for (let k = 0; k < cycle.length; ++k) {
-            if (cycle[k] == j) {
+            if (cycle[k] === j) {
                 ans = Math.max(ans, cycle.length - k);
                 break;
             }
@@ -234,6 +234,44 @@ function longestCycle(edges: number[]): number {
 }
 ```
 
+#### Rust
+
+```rust
+impl Solution {
+    pub fn longest_cycle(edges: Vec<i32>) -> i32 {
+        let n = edges.len();
+        let mut vis = vec![false; n];
+        let mut ans = -1;
+
+        for i in 0..n {
+            if vis[i] {
+                continue;
+            }
+            let mut j = i as i32;
+            let mut cycle = Vec::new();
+
+            while j != -1 && !vis[j as usize] {
+                vis[j as usize] = true;
+                cycle.push(j);
+                j = edges[j as usize];
+            }
+
+            if j == -1 {
+                continue;
+            }
+
+            for k in 0..cycle.len() {
+                if cycle[k] == j {
+                    ans = ans.max((cycle.len() - k) as i32);
+                    break;
+                }
+            }
+        }
+        ans
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/2300-2399/2360.Longest Cycle in a Graph/README_EN.md

@@ -202,23 +202,23 @@ func longestCycle(edges []int) int {
 ```ts
 function longestCycle(edges: number[]): number {
     const n = edges.length;
-    const vis = new Array(n).fill(false);
+    const vis: boolean[] = Array(n).fill(false);
     let ans = -1;
     for (let i = 0; i < n; ++i) {
         if (vis[i]) {
             continue;
         }
         let j = i;
         const cycle: number[] = [];
-        for (; j != -1 && !vis[j]; j = edges[j]) {
+        for (; j !== -1 && !vis[j]; j = edges[j]) {
             vis[j] = true;
             cycle.push(j);
         }
-        if (j == -1) {
+        if (j === -1) {
             continue;
         }
         for (let k = 0; k < cycle.length; ++k) {
-            if (cycle[k] == j) {
+            if (cycle[k] === j) {
                 ans = Math.max(ans, cycle.length - k);
                 break;
             }
@@ -228,6 +228,44 @@ function longestCycle(edges: number[]): number {
 }
 ```
 
+#### Rust
+
+```rust
+impl Solution {
+    pub fn longest_cycle(edges: Vec<i32>) -> i32 {
+        let n = edges.len();
+        let mut vis = vec![false; n];
+        let mut ans = -1;
+
+        for i in 0..n {
+            if vis[i] {
+                continue;
+            }
+            let mut j = i as i32;
+            let mut cycle = Vec::new();
+
+            while j != -1 && !vis[j as usize] {
+                vis[j as usize] = true;
+                cycle.push(j);
+                j = edges[j as usize];
+            }
+
+            if j == -1 {
+                continue;
+            }
+
+            for k in 0..cycle.len() {
+                if cycle[k] == j {
+                    ans = ans.max((cycle.len() - k) as i32);
+                    break;
+                }
+            }
+        }
+        ans
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/2300-2399/2360.Longest Cycle in a Graph/Solution.rs

@@ -0,0 +1,33 @@
+impl Solution {
+    pub fn longest_cycle(edges: Vec<i32>) -> i32 {
+        let n = edges.len();
+        let mut vis = vec![false; n];
+        let mut ans = -1;
+
+        for i in 0..n {
+            if vis[i] {
+                continue;
+            }
+            let mut j = i as i32;
+            let mut cycle = Vec::new();
+
+            while j != -1 && !vis[j as usize] {
+                vis[j as usize] = true;
+                cycle.push(j);
+                j = edges[j as usize];
+            }
+
+            if j == -1 {
+                continue;
+            }
+
+            for k in 0..cycle.len() {
+                if cycle[k] == j {
+                    ans = ans.max((cycle.len() - k) as i32);
+                    break;
+                }
+            }
+        }
+        ans
+    }
+}

solution/2300-2399/2360.Longest Cycle in a Graph/Solution.ts

@@ -1,22 +1,22 @@
 function longestCycle(edges: number[]): number {
     const n = edges.length;
-    const vis = new Array(n).fill(false);
+    const vis: boolean[] = Array(n).fill(false);
     let ans = -1;
     for (let i = 0; i < n; ++i) {
         if (vis[i]) {
             continue;
         }
         let j = i;
         const cycle: number[] = [];
-        for (; j != -1 && !vis[j]; j = edges[j]) {
+        for (; j !== -1 && !vis[j]; j = edges[j]) {
             vis[j] = true;
             cycle.push(j);
         }
-        if (j == -1) {
+        if (j === -1) {
             continue;
         }
         for (let k = 0; k < cycle.length; ++k) {
-            if (cycle[k] == j) {
+            if (cycle[k] === j) {
                 ans = Math.max(ans, cycle.length - k);
                 break;
             }