diff --git a/problems/0376.摆动序列.md b/problems/0376.摆动序列.md
index efb9c6b6..d4daccc5 100644
--- a/problems/0376.摆动序列.md
+++ b/problems/0376.摆动序列.md
@@ -462,21 +462,19 @@ var wiggleMaxLength = function(nums) {
 ```Rust
 impl Solution {
     pub fn wiggle_max_length(nums: Vec<i32>) -> i32 {
-        let len = nums.len() as usize;
-        if len <= 1 {
-            return len as i32;
+        if nums.len() == 1 {
+            return 1;
         }
-        let mut preDiff = 0;
-        let mut curDiff = 0;
-        let mut result = 1;
-        for i in 0..len-1 {
-            curDiff = nums[i+1] - nums[i];
-            if (preDiff <= 0 && curDiff > 0) || (preDiff >= 0 && curDiff < 0) {
-                result += 1;
-                preDiff = curDiff;
+        let mut res = 1;
+        let mut pre_diff = 0;
+        for i in 0..nums.len() - 1 {
+            let cur_diff = nums[i + 1] - nums[i];
+            if (pre_diff <= 0 && cur_diff > 0) || (pre_diff >= 0 && cur_diff < 0) {
+                res += 1;
+                pre_diff = cur_diff;
             }
         }
-        result
+        res
     }
 }
 ```