leetcode：43. 字符串相乘(附加一些C++string其他小练习)
目录一.leetcode：43. 字符串相乘1.问题描述2.问题分析3.问题求解 二. leetcode：541. 反转字符串 II 1.问题描述 2.题解三. leetcode：125. 验证回文串1.问题描述2.双指针法求解 一.leetcode：43. 字符串相乘字符串相乘 - 力扣（Leetcode）1.问题描述给定两个以字符串形式表示的非负整数 num1 和 num2，返回 num1 ....
【LeetCode】string 类的几道简单题
仅反转字母给你一个字符串 s ，根据下述规则反转字符串：所有非英文字母保留在原有位置。所有英文字母（小写或大写）位置反转。返回反转后的 s 。思路：这道题可以借助快排的思想，左边找出字母，右边找出字母，然后进行交换。如果不是字母，就继续找。class Solution { public: string reverseOnlyLetters(string s) { ...
LeetCode 344. 反转字符串 Reverse String
LeetCode 344. 反转字符串 Reverse StringTable of Contents一、中文版二、英文版三、My answer四、解题报告一、中文版编写一个函数，其作用是将输入的字符串反转过来。输入字符串以字符数组 char[] 的形式给出。不要给另外的数组分配额外的空间，你必须原地修改输入数组、使用 O(1) 的额外空间解决这一问题。你可以假设数组中的所有字符都是 ASCII....
LeetCode 394. Decode String
DescriptionGiven an encoded string, return its 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....
LeetCode 344. Reverse String
DescriptionWrite 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 a....
LeetCode 97. Interleaving String
DescriptionGiven s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2.Example 1:Input: s1 = "aabcc", s2 = "dbbca", s3 = "aadbbcbcac" Output: trueExample 2:Input: s1 = "aabcc", s2 = ....
LeetCode 87. Scramble String
DescriptionGiven 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...
LeetCode之First Unique Character in a String
1、题目Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.Examples:s = "leetcode" return 0. s = "loveleetcode", return 2.2、代码实现public clas....
LeetCode之Reverse String II
1、题目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....
LeetCode之Reverse String
1、题目：Write a function that takes a string as input and returns the string reversed.Example:Given s = "hello", return "olleh".2、代码实现：代码实现1: public static String reverseString(String s) { if...
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