class Solution { public: vector<int> twoSum(vector<int>& nums, int target) { vector<int> twoSum1(2); map<int,int> mValueIdex; map<int,int>::iterator it; bool flag=0; for(int i=0;i<nums.size();i++) { //两个一样. if(nums[i]=…

今天注册了大名鼎鼎的LeetCode,做了一道最简单的算法题目: Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution. Example: Given nums = [2, 7, 11, 15], target =…

package org.lep.leetcode.twosum; import java.util.Arrays; import java.util.HashMap; import java.util.Map; /** * source:https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/#/description * Created by lverpeng on 2017/6/21. * * Given an array…

LeetCode 两数之和 给定一个整数数组,返回两个数字的索引,使它们相加到特定目标. 您可以假设每个输入只有一个解决方案,并且您可能不会两次使用相同的元素. 更多文章查看个人博客 个人博客地址:twoSum 两数之和 [JAVA实现] 方法一 使用双重循环两两相加判断是否等于目标值 public List<String> twoSum2(int[] arr, int sum) { if (arr == null || arr.length == 0) { return new ArrayL…

1.普通数组找两个数,哈希表建立数值和下标的映射,遍历时一边判断一边添加 /* 哇,LeetCode的第一题...啧啧 */ public int [] twoSum(int[] nums, int target) { /* 两个数配合组成target 建立值和下标的映射,遍历数组时一边判断是否有另一半,一边添加新映射到哈希表 */ Map<Integer,Integer> map = new HashMap<>(); for (int i = 0; i < nums.len…

Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note that…

题目: Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note t…

Description Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. 题意 给定一个数组,和一个定值,找出数组元素的两…

Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution. Example: Given nums = [2, 7, 11, 15], target = 9, Because nums[0] + nums[1] = 2…

1. Two Sum Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given nums = [2,…