在JS中比较优雅的方式是利用JS的对象作为hash的方式: 1vartwoSum =function(nums, target) {2varhash ={};3vari;4for(vari = 0; i < nums.length; i++) {5if(typeofhash[nums[i]] !== "undefined") {6return[i, hash[nums[i]]];7}8hash[target
代码 /** * @param {number[]} nums * @param {number} target * @return {number[]} */ const twoSum2 = function (nums, target) { const len = nums.length; for (let i = 0; i < len; i++) { for (let j = i + 1; j < len; j++) { if (nums[i] + nums[j] === tar...
我觉得 Two Sum 系列问题就是想教我们如何使用哈希表处理问题。我们接着往后看。 TwoSum II 稍微修改一下上面的问题,要求我们设计一个类,拥有两个API: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 classTwoSum{// 向数据结构中添加一个数 numberpublicvoidadd(int number);// 寻找当前数据结构中是否存...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 1// 对撞指针2// 时间复杂度: O(n)3// 空间复杂度: O(1)4class Solution{5public:6vector<int>twoSum(vector<int>&numbers,int target){7int l=0,r=numbers.size()-1;8while(l<r){9if(numbers[l]+numbers[r]==target){10int res[2]={...
Two Sum 代码 代码语言:javascript 代码运行次数:0 运行 AI代码解释 1// 1. Two Sum2// https://leetcode.com/problems/two-sum/description/3// 时间复杂度:O(n)4// 空间复杂度:O(n)5class Solution{6public:7vector<int>twoSum(vector<int>&nums,int target){89unordered_map<int,int>record;10fo...
1. Two Sum 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. Example: Given nums = [2, 7, 11, 15], targ...
'use strict'; process.stdin.resume(); process.stdin.setEncoding('utf-8'); let inputString = ''; let currentLine = 0; process.stdin.on('data', inputStdin => { inputString += inputStdin; }); process.stdin.on('end', function() { inputString = inputString.replace(/\s*$/, '')...
var twoSum = function(nums, target) { for (var i = 0; i < nums.length; i++) { for (var j = i + 1; j < nums.length; j++) { if (nums[i] + nums[j] === target) { return [i, j] } } } } 本题更多 JavaScript 解析,点击链接访问对应的答案:https://leetcode.com ...
Two Sum(JavaScript) Q: 题目链接:Two Sum 先看题目要求: 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 yo......
1 Two sum 1 Two sum 所用语言:java 题目: 即给定整型数组,返回数组中和为目标值的两个元素的索引。 方法1:Brute force 1. 两层循环遍历数组,两两求和,如果得到target value,停止搜索,直接return相应值即可。 2. 缺点:时间复杂度为O(n^2),用时50ms,虽然也accepted但是耗时过长。 方法2:哈希表 1. 采用...