diff --git a/problems/0018.四数之和.md b/problems/0018.四数之和.md
index 6cbd40c2..d0b7fc68 100644
--- a/problems/0018.四数之和.md
+++ b/problems/0018.四数之和.md
@@ -140,6 +140,11 @@ class Solution {
        
         for (int i = 0; i < nums.length; i++) {
 
+            // nums[i] > target 直接返回, 剪枝操作
+            if (nums[i] > 0 && nums[i] > target) {
+                return result;
+            }
+
             if (i > 0 && nums[i - 1] == nums[i]) {
                 continue;
             }