From 0f1505600e2c0ab505db9111923bad63ab4e41c1 Mon Sep 17 00:00:00 2001
From: fwqaaq <fwqaaq@gmail.com>
Date: Mon, 21 Aug 2023 19:26:18 +0800
Subject: [PATCH] =?UTF-8?q?Update=200200.=E5=B2=9B=E5=B1=BF=E6=95=B0?=
 =?UTF-8?q?=E9=87=8F.=E5=B9=BF=E6=90=9C=E7=89=88.md=20about=20rust?=
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---
 problems/0200.岛屿数量.广搜版.md | 41 +++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/problems/0200.岛屿数量.广搜版.md b/problems/0200.岛屿数量.广搜版.md
index 5b9d90aa..8bbedb59 100644
--- a/problems/0200.岛屿数量.广搜版.md
+++ b/problems/0200.岛屿数量.广搜版.md
@@ -240,6 +240,47 @@ class Solution:
 
 ```
 
+### Rust
+
+```rust
+
+use std::collections::VecDeque;
+impl Solution {
+    const DIRECTIONS: [(i32, i32); 4] = [(0, 1), (1, 0), (-1, 0), (0, -1)];
+    pub fn num_islands(grid: Vec<Vec<char>>) -> i32 {
+        let mut visited = vec![vec![false; grid[0].len()]; grid.len()];
+        let mut res = 0;
+        for (i, chars) in grid.iter().enumerate() {
+            for (j, &c) in chars.iter().enumerate() {
+                if !visited[i][j] && c == '1' {
+                    res += 1;
+                    Self::bfs(&grid, &mut visited, (i as i32, j as i32));
+                }
+            }
+        }
+        res
+    }
+
+    pub fn bfs(grid: &Vec<Vec<char>>, visited: &mut Vec<Vec<bool>>, (x, y): (i32, i32)) {
+        let mut queue = VecDeque::new();
+        queue.push_back((x, y));
+        visited[x as usize][y as usize] = true;
+        while let Some((cur_x, cur_y)) = queue.pop_front() {
+            for (dx, dy) in Self::DIRECTIONS {
+                let (nx, ny) = (cur_x + dx, cur_y + dy);
+                if nx < 0 || nx >= grid.len() as i32 || ny < 0 || ny >= grid[0].len() as i32 {
+                    continue;
+                }
+                let (nx, ny) = (nx as usize, ny as usize);
+                if grid[nx][ny] == '1' && !visited[nx][ny] {
+                    visited[nx][ny] = true;
+                    queue.push_back((nx as i32, ny as i32));
+                }
+            }
+        }
+    }
+}
+```
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