Merge pull request youngyangyang04#1944 from fwqaaq/patch-10

Update 0055.跳跃游戏.md 优化 rust

Author: youngyangyang04

problems/0055.跳跃游戏.md

@@ -178,16 +178,16 @@ var canJump = function(nums) {
 
 ```Rust
 impl Solution {
-    fn max(a: usize, b: usize) -> usize {
-        if a > b { a } else { b }
-    }
     pub fn can_jump(nums: Vec<i32>) -> bool {
-        let mut cover = 0;
-        if (nums.len() == 1) { return true; }
-        let mut i = 0;
+        if nums.len() == 1 {
+            return true;
+        }
+        let (mut i, mut cover) = (0, 0);
         while i <= cover {
-            cover = Self::max(i + nums[i] as usize, cover);
-            if cover >= nums.len() - 1 { return true; }
+            cover = (i + nums[i] as usize).max(cover);
+            if cover >= nums.len() - 1 {
+                return true;
+            }
             i += 1;
         }
         false