一个很常见的问题,找出一个数组中和为给定值的两个数的下标.为了简单一般会注明解只有一个之类的. 最容易想到的方法是循环遍历,这里就不说了. 在JS中比较优雅的方式是利用JS的对象作为hash的方式: var twoSum = function(nums, target) { var hash = {}; var i; for (var i = 0; i < nums.length; i++ ) { if (typeof hash[nums[i]] !== "undefined")…

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…

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…

LeetCode: 1. twoSum 题目描述 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, Becau…

题目链接:http://www.lintcode.com/zh-cn/problem/two-sum/ 给一个整数数组,找到两个数使得他们的和等于一个给定的数target. 备份一份,然后排序.搞两个指针分别从左从右开始扫描,每次判断这两个数相加是不是符合题意,如果小了,那就把左边的指针向右移,同理右指针.然后在备份的数组里找到位置. class Solution: """ @param numbers : An array of Integer @param target…

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 =…

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…

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…