Merge pull request #1730 from Jack-Zhang-1314/patch-4

update 0239.滑动窗口最大值.md about rust

problems/0239.滑动窗口最大值.md

@@ -802,6 +802,35 @@ class myDequeue{
     }
 ```
 
+rust:
+
+```rust
+impl Solution {
+    pub fn max_sliding_window(nums: Vec<i32>, k: i32) -> Vec<i32> {
+        let mut res = vec![];
+        let mut queue = VecDeque::with_capacity(k as usize);
+        for (i, &v) in nums.iter().enumerate() {
+            // 如果队列长度超过 k，那么需要移除队首过期元素
+            if i - queue.front().unwrap_or(&0) == k as usize {
+                queue.pop_front();
+            }
+            while let Some(&index) = queue.back() {
+                if nums[index] >= v {
+                    break;
+                }
+                // 如果队列第一个元素比当前元素小，那么就把队列第一个元素弹出
+                queue.pop_back();
+            }
+            queue.push_back(i);
+            if i >= k as usize - 1 {
+                res.push(nums[queue[0]]);
+            }
+        }
+        res
+    }
+}
+```
+
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