diff --git a/problems/0015.三数之和.md b/problems/0015.三数之和.md
index 1dabe885..55e22887 100644
--- a/problems/0015.三数之和.md
+++ b/problems/0015.三数之和.md
@@ -207,7 +207,7 @@ class Solution {
                     while (right > left && nums[right] == nums[right - 1]) right--;
                     while (right > left && nums[left] == nums[left + 1]) left++;
                     
-                    right--;
+                    right--; 
                     left++;
                 }
             }