diff --git a/problems/0045.跳跃游戏II.md b/problems/0045.跳跃游戏II.md
index 911834e1..9b13d31d 100644
--- a/problems/0045.跳跃游戏II.md
+++ b/problems/0045.跳跃游戏II.md
@@ -386,13 +386,13 @@ impl Solution {
         let mut cur_distance = 0;
         let mut ans = 0;
         let mut next_distance = 0;
-        for (n, &i) in nums.iter().enumerate() {
-            next_distance = (n as i32 + i).max(next_distance);
+        for (i, &n) in nums.iter().enumerate().take(nums.len() - 1) {
+            next_distance = (n as usize + i).max(next_distance);
             if i == cur_distance {
-                if cur_distance < n as i32 - 1 {
+                if cur_distance < nums.len() - 1 {
                     ans += 1;
                     cur_distance = next_distance;
-                    if next_distance >= n as i32 - 1 {
+                    if next_distance >= nums.len() - 1 {
                         break;
                     };
                 } else {
@@ -403,7 +403,6 @@ impl Solution {
         ans
     }
 }
-
 ```
 
 ```Rust
@@ -416,8 +415,8 @@ impl Solution {
         let mut cur_distance = 0;
         let mut ans = 0;
         let mut next_distance = 0;
-        for (n, &i) in nums.iter().enumerate() {
-            next_distance = (n as i32 + i).max(next_distance);
+        for (i, &n) in nums.iter().enumerate().take(nums.len() - 1) {
+            next_distance = (n as usize + i).max(next_distance);
             if i == cur_distance {
                 cur_distance = next_distance;
                 ans += 1;
@@ -426,7 +425,6 @@ impl Solution {
         ans
     }
 }
-
 ```