Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: Elements in a triplet (a,b,c) must be in non-descending order. (ie, a ≤ b ≤ c) The solut…

Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: The solution set must not contain duplicate triplets. Example: Given array nums =…

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:3sum, 三数之和,题解,leetcode, 力扣,Python, C++, Java 题目地址: https://leetcode.com/problems/3sum/description/ 题目描述: Given an array nums of n integers, are there elements a, b, c in nums suc…

3Sum  Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: Elements in a triplet (a,b,c) must be in non-descending order. (ie, a ≤ b ≤ c) The…

题目链接 [题解] 先把n个数字升序排个序. 然后枚举三元组最左边的那个数字是第i个数字. 之后用两个指针l,r移动来获取三元组的第2个和第3个数字. (初始值,l=i+1,r = n-1); 如果a[i]+a[l]+a[r]>0 那么说明后面两个数字a[l]和a[r]太大了. 得让其中较大的那个数字a[r]变小一点. 也即r-- 否则l++即可. 这就给我们在一个一维数组中找两个数的和为x的二元组个数提供了思路. 即令l=1,r=n 若a[l]+a[r]>x那么,让r--. 否则让l++.…

Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: Elements in a triplet (a,b,c) must be in non-descending order. (ie, a ≤ b ≤ c) The solut…

题目等级:3Sum(Medium) 题目描述: Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: The solution set must not contain duplicate triplets. Exam…

1. 题目 2.题目分析与思路 3.思路 1. 题目 给定一个包含 n 个整数的数组 nums,判断 nums 中是否存在三个元素 a,b,c ,使得 a + b + c = 0 ?找出所有满足条件且不重复的三元组. 注意:答案中不可以包含重复的三元组. 例如, 给定数组 nums = [-1, 0, 1, 2, -1, -4], 满足要求的三元组集合为:[ [-1, 0, 1], [-1, -1, 2]] 2. 思路 这道题最直接想到的应该是两数之和,两数之和还是比较基础的,采用通知记录的方式…

题目:三数之和 内容: 给定一个包含 n 个整数的数组 nums,判断 nums 中是否存在三个元素 a,b,c ,使得 a + b + c = 0 ?找出所有满足条件且不重复的三元组. 注意:答案中不可以包含重复的三元组. 例如, 给定数组 nums = [-1, 0, 1, 2, -1, -4], 满足要求的三元组集合为: [ [-1, 0, 1], [-1, -1, 2] ] 思路:题目实现可分为两个步骤,分别是(1)寻找三个满足条件的元素(2)去重复对于第一个小问题,首先考虑三个for循…

Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: The solution set must not contain duplicate triplets. Example: Given array nums =…