这个问题是我目前的知识回答,不来,只有良好的网上搜索解决方案,发现 K Sum 它是一类问题,但是,互联网是没有更简洁的代码,我想对于谁刚开始学习的人.您可能仍然想看看这个问题该怎么解决,然后看看他们的利益扩展它. [称号] 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 give…

https://oj.leetcode.com/problems/merge-k-sorted-lists/ 归并K已经整理阵列,和分析算法的复杂. 解决报告:无论是不考虑优化,最简单的实现是要重新走路List<ListNode>.对当中每一个链表同当前链表做一遍类似于归并排序最后一步的merge操作. 算法复杂度是O(KN) public class Solution { ListNode mergeTwoLists(ListNode list1, ListNode list2) { Lis…

Permutations Given a collection of numbers, return all possible permutations. For example,[1,2,3] have the following permutations:[1,2,3], [1,3,2], [2,1,3], [2,3,1], [3,1,2], and [3,2,1]. SOLUTION 1: 经典的递归回溯题目,一次ACCEPT. 请也参考上一个题目LeetCode: Combination…

插话:只写了几个连续的博客,博客排名不再是实际"远在千里之外"该.我们已经进入2一万内. 再接再厉.油! Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set. get(key) - Get the value (will always be positive) of the ke…

[称号] Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. For example, given the following triangle [ [], [,4], [6,,7], [4,,8,3] ] The minimum path sum from top to bottom is 11 (…

Given an array of n integers nums and a target, find the number of index triplets i, j, k with 0 <= i < j < k < n that satisfy the condition nums[i] + nums[j] + nums[k] < target. For example, given nums = [-2, 0, 1, 3], and target = 2. Retu…

Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exactly one solution. For example, given array S = {-1 2…

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…

3Sum Closest Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exactly one solution. For example, given arr…

Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exactly one solution. For example, given array S = {-1 2…

原题链接在这里:https://leetcode.com/problems/3sum-smaller/ 题目: Given an array of n integers nums and a target, find the number of index triplets i, j, k with 0 <= i < j < k < n that satisfy the condition nums[i] + nums[j] + nums[k] < target. For e…

一.130  Surrounded Regions(https://leetcode.com/problems/surrounded-regions/description/) 题目: 解法: 这道题的意思是将所有被X包围的O都变为X(边缘的不算),我们可以维护一个队列,先把四周的O的位置放进队列中,并把这个位置的值变为Y.然后每次从队列中拿出一个位置,把这个位置四周为O的位置的值变为Y,再把这个位置放进队列(为什么要先变值再进队列呢?在下一道题中会说).一直到队列为空时,我们就成功地把所有直接…

import java.util.*; /** * Source : https://oj.leetcode.com/problems/3sum/ * * Created by lverpeng on 2017/7/10. * * 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…

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: The solution set must not contain duplicate triplets. For example, given array S = [-1,…

1.题目描述 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…

1.题目描述 Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. For example, given s = "aab", Return [ ["aa","b"], ["a","a"…

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…

自己做得LeetCode的题解,使用C++语言. 说明:大多数自己做得,部分参考别人的思路,仅供参考; GitHub地址:https://github.com/amazingyyc/The-Solutions-of-leetcode…

二手和3Sum像几乎相同的想法.二进制搜索.关键修剪.但是,在修剪做出很多错误. 然后还有一个更加速了原来的想法O(n^2). #include<iostream> #include <vector> #include <algorithm> #include <math.h> using namespace std; class Solution { public: int threeSumClosest(vector<int> &nu…

剑指offer之面试题37 两个链表的第一个公共结点 提交网址: http://www.nowcoder.com/practice/6ab1d9a29e88450685099d45c9e31e46?tpId=13&tqId=11189 leetcode 160: https://leetcode.com/problems/intersection-of-two-linked-lists/ 参与人数:3252   时间限制:1秒   空间限制:32768K 本题知识点: 链表 时间空间效率的平衡题…

Subsets Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example, If S = [1,2,3], a solution is: [ [3], [1], [2], [1…

题意 Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exactly one solution. 给定一个数组及一个目标值,找出三个数,使它们的和与目标值的差值最…

Sudoku SolverWrite a program to solve a Sudoku puzzle by filling the empty cells. Empty cells are indicated by the character '.'. You may assume that there will be only one unique solution.…

3sum Closest: Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exactly one solution. For example, given ar…

3Sum 题目 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)…

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…

class Solution(object): def threeSumClosest(self, nums, target): """ :type nums: List[int] :type target: int :rtype: int """ if len(nums) <= 2: return False nums.sort() res=nums[0]+nums[1]+nums[2] for i in range(len(nums)-…

# sort the array# loop from i = 0 # then left=i+1 right=len(nums)-1# try nums[i] - ( nums[left]+nums[right]) = 0 # class Solution(object): def threeSum(self, nums): """ :type nums: List[int] :rtype: List[List[int]] """ res=li…

D. A Lot of Games time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Andrew, Fedor and Alex are inventive guys. Now they invent the game with strings for two players. Given a group of n non-em…

E. Little Pony and Summer Sun Celebration time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Twilight Sparkle learnt that the evil Nightmare Moon would return during the upcoming Summer Sun Ce…