题目描述 LeetCode 344. 反转字符串 请编写一个函数,其功能是将输入的字符串反转过来. 示例 输入: s = "hello" 返回: "olleh" Java 解答 class Solution { public String reverseString(String s) { if (s == null || s.length() <= 1) { return s; } char[] arr = s.toCharArray(); int leng…

Write a function that reverses a string. The input string is given as an array of characters char[]. Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory. You may assume all the…

请编写一个函数,其功能是将输入的字符串反转过来.示例:输入:s = "hello"返回:"olleh"详见:https://leetcode.com/problems/reverse-string/description/C++: class Solution { public: string reverseString(string s) { int n=s.size(); if(n==0||s.empty()) { return ""; }…

Leetcode 344:Reverse String 反转字符串 公众号:爱写bug Write a function that reverses a string. The input string is given as an array of characters char[]. Do not allocate extra space for another array, you must do this by modifying the input array in-place wit…

题目描述 编写一个函数,其作用是将输入的字符串反转过来. 示例 1: 输入: "hello" 输出: "olleh" 示例 2: 输入: "A man, a plan, a canal: Panama" 输出: "amanaP :lanac a ,nalp a ,nam A" 思路 思路一: 逆序拼接字符串 思路二: 依次交换两边的值 思路三: 直接调用StringBuilder 的 reverse() 思路四: 用栈来实现反…

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…

344. Reverse String 最基础的旋转字符串 class Solution { public: void reverseString(vector<char>& s) { if(s.empty()) return; ; ; while(start < end){ char tmp = s[end]; s[end] = s[start]; s[start] = tmp; start++; end--; } return; } }; 541. Reverse Strin…

题意:反转字符串,用好库函数. class Solution { public: string reverseString(string s) { reverse(s.begin(),s.end()); return s; } };…

Write a function that reverses a string. The input string is given as an array of characters char[]. Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory. You may assume all the…

Problem: Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". 此题一般思路为:在原数组上直接对s[i]以及s[len-i-1]进行调换即可. char* reverseString(char* s) { , len = ; len = strlen(s); ; i &…

题目描述: Write a function that takes a string as input and returns the string reversed. Example:Given s = "hello", return "olleh". 解题思路: 见代码. 代码如下: class Solution(object): def reverseString(self, s): """ :type s: str :rtype…

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…

problem 344. Reverse String solution: class Solution { public: void reverseString(vector<char>& s) { vector<'); ; i>=; i--) { temp[i] = s[s.size()-i-]; } ; i<s.size(); i++) { s[i] = temp[i]; } } }; solution2: class Solution { public: vo…

344. Reverse String Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". 题目大意: 字符串倒置. 解题方法: 第一个字符与最后一个非空字符对换. 注意事项: 1.字符串最后一个字符是空字符. C++代码: 1.不良代码: class Solution {…

344. Reverse String[easy] Write a function that takes a string as input and returns the string reversed. Example:Given s = "hello", return "olleh". 解法一: class Solution { public: string reverseString(string s) { , end = s.length() - ; w…

一年没有管理博客园了,说来实在惭愧.. 最近开始刷LeetCode,之前没刷过,说来也实在惭愧... 刚开始按 AC Rates 从简单到难刷,觉得略无聊,就决定按 Add Date 刷,以后也可能看心情随便选题…(⊙o⊙)…今天做了14年 Add 的三个题,其中 Maximum Product Subarray 着实把我折腾了好一会儿,所以想想还是跟大家分享一下我的解法,也或许有更好的方法,期待大家的分享.就把三个题按 Add Date 的先后顺序分享一下吧. Add Date 2014-03…

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…

［抄题］: [暴力解法]: 时间分析: 空间分析: ［奇葩输出条件］: ［奇葩corner case］: ［思维问题］: 还停留在 i < len / 2的阶段,不行,应该是指针对撞问题了 ［一句话思路］: 先要把字符串转成数组,再转回来,数据结构白学了? ［输入量］:空: 正常情况:特大:特小:程序里处理到的特殊情况:异常情况(不合法不合理的输入): ［画图］: ［一刷］: 用.tochararray转成字符串数组,顾名思义了 ［二刷］: ［三刷］: ［四刷］: ［五刷］: [五分钟肉眼deb…

------------------------------- Java也可以实现一行代码反转字符串哦 AC代码如下: public class Solution { public String reverseString(String s) { return new StringBuffer(s).reverse().toString(); } } 题目来源: https://leetcode.com/problems/reverse-string/…

Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". 这道题没什么难度,直接从两头往中间走,同时交换两边的字符即可,参见代码如下: 解法一: class Solution { public: string reverseString(string s) { , right =…

1.2 Implement a function void reverse(char *str) in C or C++ which reverses a null-terminated string. 这道题让我们用C++或C语言来翻转一个字符串,不算一道难题,在之前那道Reverse Words in a String 翻转字符串中的单词中用到了这个函数,跟那道题比起来,这题算简单的了.C语言的版本要比C++的稍微复杂一些,应为string类集成了很多有用的功能,比如得到字符串的长度,用下标…

题目: Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". 思路: 题意:反转字符串 不用考虑为空的情况,这种情况sb.toString()也是null,倒叙遍历,StringBuffer相加 代码: public class Solution { public String…

编写一个函数,以字符串作为输入,反转该字符串中的元音字母.示例 1:给定 s = "hello", 返回 "holle".示例 2:给定 s = "leetcode", 返回 "leotcede".注意:元音字母不包括 "y".详见:https://leetcode.com/problems/reverse-vowels-of-a-string/description/ C++: class Solutio…

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". (二)解题 题目大意:给定一个链表,将…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 新构建字符串 原地翻转 日期 题目地址:https://leetcode.com/problems/reverse-string/ Total Accepted: 11014 Total Submissions: 18864 Difficulty: Easy 题目描述 Write a function that takes a string as input…

[Question] Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "olleh". [My Solution] Slice 切片 class Solution(object): def reverseString(self, s): """ :type s…

描述: 给定32位整数,反转,如321转成123. 解决: 关键是溢出检测: int reverse(int x) { ; int temp; while (x) { temp = ret * + x % ; != ret) ; ret = temp; x /= ; } return ret; } 看了下其他答案,还有一些思路: 先声明个long,看最后是否溢出,这样只有long是64位时可以,或者用int64_t. 还有先转字符串反转再转数字的.…

Given a string S, check if the letters can be rearranged so that two characters that are adjacent to each other are not the same. If possible, output any possible result.  If not possible, return the empty string. Example 1: Input: S = "aab" Out…

Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer. You may assume th…

Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. Below is one possible representation of s1 = "great": great / \ gr eat / \ / \ g r e at / \ a t To scramble the string, we may ch…