diff --git a/problems/0977.有序数组的平方.md b/problems/0977.有序数组的平方.md
index b8890052..996a7cee 100644
--- a/problems/0977.有序数组的平方.md
+++ b/problems/0977.有序数组的平方.md
@@ -183,14 +183,14 @@ Rust
 impl Solution {
     pub fn sorted_squares(nums: Vec<i32>) -> Vec<i32> {
         let n = nums.len();
-        let (mut i,mut j,mut k) = (0,n - 1,n- 1);
+        let (mut i,mut j,mut k) = (0,n - 1,n);
         let mut ans = vec![0;n];
         while i <= j{
             if nums[i] * nums[i] < nums[j] * nums[j] {
-                ans[k] = nums[j] * nums[j];
+                ans[k-1] = nums[j] * nums[j];
                 j -= 1;
             }else{
-                ans[k] = nums[i] * nums[i];
+                ans[k-1] = nums[i] * nums[i];
                 i += 1;
             }
             k -= 1;