344. Reverse String /** * @param {string} s * @return {string} */ var reverseString = function(s) { return s.split("").reverse().join(""); }; 292. Nim Game 尼姆游戏还是很有意思的,这题有很多地方可以深入理解 /** * @param {number} n * @return {boolean} */ var ca…

这是悦乐书的第256次更新,第269篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第123题(顺位题号是541).给定一个字符串和一个整数k,你需要反转从字符串开头算起的每2k个字符的前k个字符. 如果剩下少于k个字符,则反转所有字符. 如果小于2k但大于等于k个字符,则反转前k个字符,剩下的字符不变.例如: 输入:s ="abcdefg",k = 2 输出:"bacdfeg" 注意: 该字符串仅包含小写的英文字母. 给定字符串的长度和…

这是悦乐书的第205次更新,第217篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第73题(顺位题号是344).编写一个以字符串作为输入并返回字符串的函数.例如: 输入:"hello" 输出:"olleh" 输入:"A man, a plan, a canal: Panama" 输出:"amanaP: lanac a, nalp a, nam A" 本次解题使用的开发工具是eclipse,jdk使…

Problem: Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 终于什么都没参考就一次Accept了.可能是这题比较简单,同时自己也进步了一点点,leetcode就是这样给我们增加信心的吧. 我是这样想的,利用除10和模10两个操作,将每个数字分离在vec中,然后相应的乘以10的倍数输出就行.如果这个数在-10与10之间直接返回就好. 代码如下: class S…

problem: Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remain as it is. You may not alter the values in the nodes,…

Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters left, reverse all of them. If there are less than 2k but greater than or eq…

Reverse Integer Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 time=272ms accepted public class Solution { public int reverse(int x) { long recv=0; int mod=0; int xabs=Math.abs(x); while(xabs>0){ mod=xabs%…

Implement atoi which converts a string to an integer.The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, starting from this character, takes an optional initial plus or minus…

原题链接在这里:https://leetcode.com/problems/reverse-string/ 题目: Write a function that takes a string as input and returns the string reversed. Example:Given s = "hello", return "olleh". 题解: Reverse string是常见题, string在Java中是primitive类型, 一旦生成不…

原题地址: 344 Reverse String: https://leetcode.com/problems/reverse-string/description/ 541 Reverse String II: https://leetcode.com/problems/reverse-string-ii/description/ 题目&&解法: 1.Reverse String: Write a function that takes a string as input and ret…