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…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 个人公众号:负雪明烛 本文关键词:two sum, 两数之和,题解,leetcode, 力扣,Python, C++, Java 目录 题目描述 题目大意 解题方法 字典+两次遍历 字典+一次遍历 双指针 日期 题目地址:https://leetcode.com/problems/two-sum/#/description 题目描述 Given an array of integers,…

1. Two Sum 两数之和 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…

文章目录 Hash表简介 基本思想 建立步骤 问题 Hash表实现 Hash函数构造 冲突处理方法 leetcode两数之和python实现 题目描述 基于Hash思想的实现 Hash表简介 基本思想 哈希存储的基本思想是根据当前待存储数据的特征,以记录关键字(key)为自变量,设计一个哈希函数Hash,根据Hash计算出对应的函数值Hash(key),以这个值(哈希地址)作为数据元素的地址,并将数据元素存入到相应地址的存储单元中.按照这个思想构造的表就叫做哈希表(Hash table,也叫散列…

Part 1. 题目描述 (easy) 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 n…

  两数之和     给定一个整数数组和一个目标值,找出数组中和为目标值的两个数. 你可以假设每个输入只对应一种答案,且同样的元素不能被重复利用. 示例: 给定 nums = [2, 7, 11, 15], target = 9 因为 nums[0] + nums[1] = 2 + 7 = 9 所以返回 [0, 1] 二层循环很容易解决. 为了优化时间 考虑使用哈希, 每次遍历把元素的位置存到哈希当中. 遍历nums, 对每个元素cur检查target - cur是否在哈希当中, 在就返回位置,…

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…

下一篇:LeetCode链表相加-Python<二> 题目:https://leetcode-cn.com/problems/two-sum/description/ 给定一个整数数组和一个目标值,找出数组中和为目标值的两个数. 你可以假设每个输入只对应一种答案,且同样的元素不能被重复利用. 示例: 给定 nums = [2, 7, 11, 15], target = 9 因为 nums[0] + nums[1] = 2 + 7 = 9 所以返回 [0, 1] 解法一 求差值,判断差值是否在n…

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, and you may not use the same element twice. Example: Given nums = [2, 7…

---恢复内容开始--- 参考博客: https://www.cnblogs.com/grandyang/p/4130379.html https://blog.csdn.net/weixin_38715903/article/details/80483609 为了吃饭,于是就开启了leetcode的刷题之旅.其实应该在暑假就开始的,奈何个人太懒惰了,在此进行自我的检讨. 说回正题,leetcode和之前刷的oj的格式感觉不大一样,一开始看的时候感觉很不适应,但后来其实弄清楚门路了就还好.只要把…