作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 个人公众号:负雪明烛 本文关键词:four sum, 4sum, 四数之和,题解,leetcode, 力扣,Python, C++, Java 目录 题目描述 题目大意 解题方法 遍历 相似题目 参考资料 日期 题目地址:https://leetcode.com/problems/4sum/description/ 题目描述 Given an array nums of n intege…

4Sum Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: Elements in a quadruplet (a,b,c,d) must be in non-descending o…

题目: 思路:这题和15题很像,外层再加一个循环稍作修改即可 public class Solution { public List<List<Integer>> fourSum(int[] nums, int target) { List<List<Integer>> result=new ArrayList<List<Integer>>(); int len=nums.length; if(len<4) return res…

题目等级:4Sum(Medium) 题目描述: Given an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: The solution se…

一天一道LeetCode (一)题目 Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: Elements in a quadruplet (a,b,c,d) must be in no…

题目: Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: The solution set must not contain duplicate quadruplets. For ex…

题目描述 18. 四数之和 给定一个包含 n 个整数的数组 nums 和一个目标值 target,判断 nums 中是否存在四个元素 a,b,c 和 d ,使得 a + b + c + d 的值与 target 相等?找出所有满足条件且不重复的四元组. 注意:答案中不可以包含重复的四元组. 示例: 给定数组 nums = [1, 0, -1, 0, -2, 2],和 target = 0 满足要求的四元组集合为:[[-1, 0, 0, 1],[-2, -1, 1, 2],[-2, 0, 0, 2…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 字典 日期 题目地址:https://leetcode.com/problems/4sum-ii/description/ 题目描述 Given four lists A, B, C, D of integer values, compute how many tuples (i, j, k, l) there are such that A[i]…

题目:Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: Elements in a quadruplet (a,b,c,d) must be in non-descending ord…

题目: Given four lists A, B, C, D of integer values, compute how many tuples (i, j, k, l) there are such that A[i] + B[j] + C[k] + D[l] is zero. To make problem a bit easier, all A, B, C, D have same length of N where 0 ≤ N ≤ 500. All integers are in t…