From f9c2d9677bdf6432c87b4c91b4596fc634599c93 Mon Sep 17 00:00:00 2001
From: fwqaaq <fwqaaq@gmail.com>
Date: Tue, 16 Jan 2024 14:35:10 +0800
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---
 .../0417.太平洋大西洋水流问题.md    | 104 ++++++++++++++++++
 1 file changed, 104 insertions(+)

diff --git a/problems/0417.太平洋大西洋水流问题.md b/problems/0417.太平洋大西洋水流问题.md
index 21f8a1ca..8fe0f1b4 100644
--- a/problems/0417.太平洋大西洋水流问题.md
+++ b/problems/0417.太平洋大西洋水流问题.md
@@ -666,6 +666,110 @@ func bfs(heights [][]int, visited [][]bool, i, j int) {
 }
 ```
 
+### Rust
+
+dfs:
+
+```rust
+impl Solution {
+    const DIRECTIONS: [(isize, isize); 4] = [(0, 1), (0, -1), (1, 0), (-1, 0)];
+    pub fn pacific_atlantic(heights: Vec<Vec<i32>>) -> Vec<Vec<i32>> {
+        let (m, n) = (heights.len(), heights[0].len());
+        let mut res = vec![];
+        let (mut pacific, mut atlantic) = (vec![vec![false; n]; m], vec![vec![false; n]; m]);
+
+        // 列
+        for i in 0..m {
+            Self::dfs(&heights, &mut pacific, i, 0);
+            Self::dfs(&heights, &mut atlantic, i, n - 1);
+        }
+
+        for j in 0..n {
+            Self::dfs(&heights, &mut pacific, 0, j);
+            Self::dfs(&heights, &mut atlantic, m - 1, j);
+        }
+
+        for i in 0..m {
+            for j in 0..n {
+                if pacific[i][j] && atlantic[i][j] {
+                    res.push(vec![i as i32, j as i32]);
+                }
+            }
+        }
+
+        res
+    }
+
+    pub fn dfs(heights: &[Vec<i32>], visited: &mut [Vec<bool>], i: usize, j: usize) {
+        visited[i][j] = true;
+        for (dx, dy) in Self::DIRECTIONS {
+            let (x, y) = (i as isize + dx, j as isize + dy);
+            if x < 0 || x >= heights.len() as isize || y < 0 || y >= heights[0].len() as isize {
+                continue;
+            }
+            let (x, y) = (x as usize, y as usize);
+            if !visited[x][y] && heights[x][y] >= heights[i][j] {
+                Self::dfs(heights, visited, x, y);
+            }
+        }
+    }
+}
+```
+
+bfs:
+
+```rust
+use std::collections::VecDeque;
+
+impl Solution {
+    const DIRECTIONS: [(isize, isize); 4] = [(0, 1), (0, -1), (1, 0), (-1, 0)];
+    pub fn pacific_atlantic(heights: Vec<Vec<i32>>) -> Vec<Vec<i32>> {
+        let (m, n) = (heights.len(), heights[0].len());
+        let mut res = vec![];
+        let (mut pacific, mut atlantic) = (vec![vec![false; n]; m], vec![vec![false; n]; m]);
+
+        // 列
+        for i in 0..m {
+            Self::bfs(&heights, &mut pacific, i, 0);
+            Self::bfs(&heights, &mut atlantic, i, n - 1);
+        }
+
+        for j in 0..n {
+            Self::bfs(&heights, &mut pacific, 0, j);
+            Self::bfs(&heights, &mut atlantic, m - 1, j);
+        }
+
+        for i in 0..m {
+            for j in 0..n {
+                if pacific[i][j] && atlantic[i][j] {
+                    res.push(vec![i as i32, j as i32]);
+                }
+            }
+        }
+
+        res
+    }
+
+    pub fn bfs(heights: &[Vec<i32>], visited: &mut [Vec<bool>], i: usize, j: usize) {
+        let mut queue = VecDeque::from([(i, j)]);
+        visited[i][j] = true;
+        while let Some((i, j)) = queue.pop_front() {
+            for (dx, dy) in Self::DIRECTIONS {
+                let (x, y) = (i as isize + dx, j as isize + dy);
+                if x < 0 || x >= heights.len() as isize || y < 0 || y >= heights[0].len() as isize {
+                    continue;
+                }
+                let (x, y) = (x as usize, y as usize);
+                if !visited[x][y] && heights[x][y] >= heights[i][j] {
+                    queue.push_back((x, y));
+                    visited[x][y] = true;
+                }
+            }
+        }
+    }
+}
+```
+
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