publicList<String>twoSum(int[] arr,intsum){if(arr ==null|| arr.length ==0) {returnnewArrayList<>(); } List<String> st =newArrayList<>(); Map<Integer, Integer> map =newHashMap<>();for(inti=0; i < arr.length; i++) {// 查看数组中是否存在当前值和目标值差的值if(map.containsKe...
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 your returned answers (both index1 ...
import java.util.ArrayList; import java.util.Arrays; import java.util.List; public class Solution { //javascript:void(0) //K sum 可以递归去做 /* * 2Sum问题的求解:排序外加双指针来实现 * */ public List<List<Integer>> twoSum(int[] nums,int target) { List<List<Integer>> twoResList=...
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[] ...
LeetCode(力扣) 题库 第1题 Two Sum(两数之和) java新手 清晰解题过程,恢复内容开始1.用scanner读进来用nextline得到所有输入存在字符串s1里输入:nums=[2,17,11,15],target=92.用for循环+字符串的charAt函数,再建立一个整数数组,将读进来的字符串s1判断一下,数字和逗号
[leetcode] 1. two sum两数之和 2020-07-22 |阅: 转: | 分享 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 ...
代码实现-Java 01 解法一 由于加法需要从最低位开始运算,而最低位在链表末尾,链表只能从前往后遍历,没法取到前面的元素,那怎么办呢? 我们可以利用栈来保存所有的元素,然后利用栈的后进先出的特点就可以从后往前取数字了,我们首先遍历两个链表,将所有数字分别压入两个栈s1和s2中,我们建立一个值为0的head节点,然...
第一道题Two Sum如下: 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 your returned...
leetcode No167:https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/ Givenan array of integers thatisalready sortedinascendingorder,find two numbers such that theyaddup to a specific target number.Thefunction twoSum shouldreturnindices of the two numbers such that theyaddup to the ...
输出:s = "leetcode", t = "practice" 输出:5 提示:用合适的字符替换 t 中的 'p', 'r', 'a', 'i' 和 'c',使 t 变成 s 的字母异位词。 示例3: 输出:s = "anagram", t = "mangaar" 输出:0 提示:"anagram" 和 "mangaar" 本身就是一组字母异位词。 示例4: 输出:s = "xxyyzz...