Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+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 order. (ie,a≤b≤c≤d)The solution set must not contain duplicate quadruplets. .
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2013-10-17 11:58:00
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4SumGiven an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum...
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2021-08-07 11:43:41
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Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
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2014-11-25 13:59:00
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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 w
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2017-06-26 11:26:00
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Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
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2014-08-05 13:19:00
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继续运用3sum的思路，3sum会做这道题就很简单：最内层循环同样是使用iterator首尾指向已排序的vector数列，外层则是
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2023-01-11 11:55:31
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可以按照3Sum的思路来做，并以此类推，KSum的复杂度就是O(N^(k-1)). 在3Sum外面再套一层循环，相当于N次求3Sum 若还有时间，可以参考https://discuss.leetcode.com/topic/29585/7ms-java-code-win-over-100 有更多优化
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2014-10-12 04:03:00
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题目链接：https://leetcode.com/problems/4sum/题目：Given an array S of n integers, are there elements a, b, c, and d in S such that a + b
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2023-07-27 00:00:42
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就是O(N3)。。。的复杂度，注意去除重复class Solution {public:vector< vector<int> > fou
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2022-09-26 10:00:29
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Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
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2014-06-18 15:50:00
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原题链接:http://oj.leetcode.com/problems/4sum/这道题要求跟3Sum差点儿相同，仅仅是需求扩展到四个的数字的和了。我们还是能够依照3Sum中的解法，仅仅是在外面套一层循环。相当于求n次3Sum。我们知道3Sum的时间复杂度是O(n^2)，所以假设这样解的总时间复杂...
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2016-01-26 10:02:00
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问题描述： 从一些数中取出四个，使和等于N，可任意重复取，求所有的情况。 与以下题目相似 http://oj.leetcode.com/problems/4sum/解题思路： 暴力解法（四重循环），效率很低 利用hash的方法：先将数据两两相加，将和作为key,将两个数据组成的集合作为值value；由于相同的和值的组合可能有多个，所以 val
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2013-12-21 22:03:45
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Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
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2014-07-04 11:44:00
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https://oj.leetcode.com/problems/4sum/ http://www.programcreek.com/2013/02/leetcode-4sum-java/public class Solution {
public List<List<Integer>>
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2015-01-02 17:28:05
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Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
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2015-02-06 14:40:00
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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:
Element
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2017-07-08 12:59:00
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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 quadrup
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2022-08-03 17:04:00
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Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target?
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2022-08-23 20:05:08
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Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
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2015-02-10 13:39:00
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4Sum 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 ar
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2016-04-16 08:56:00
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