From 718d3c065a351547f1c95a1941372b40e36e07e8 Mon Sep 17 00:00:00 2001
From: SteveL <66228787+stevenleon99@users.noreply.github.com>
Date: Thu, 27 Jun 2024 07:33:01 -0400
Subject: [PATCH] =?UTF-8?q?Update=200018.=E5=9B=9B=E6=95=B0=E4=B9=8B?=
 =?UTF-8?q?=E5=92=8C.md?=
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add 剪枝 to the second for loop
---
 problems/0018.四数之和.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/problems/0018.四数之和.md b/problems/0018.四数之和.md
index 9c8bb4fe..8e34713d 100644
--- a/problems/0018.四数之和.md
+++ b/problems/0018.四数之和.md
@@ -262,6 +262,11 @@ class Solution {
             
             for (int j = i + 1; j < nums.length; j++) {
 
+		// nums[i]+nums[j] > target 直接返回, 剪枝操作
+		            if (nums[i]+nums[j] > 0 && nums[i]+nums[j] > target) {
+		                return result;
+		            }
+
                 if (j > i + 1 && nums[j - 1] == nums[j]) {  // 对nums[j]去重
                     continue;
                 }