https://leetcode.com/problems/reverse-integer/ understanding: 最intuitive的办法就是直接把integer化成string,然后变成list。这里如果化成string,会有溢出的问题,比如integer是1534236469,这个数字反过来就是个很大的数,溢出了,必须返回0. 如果是直接用int计算的,那就会自动溢出得到正确结果。这里如果变成list,则效率底下。
reverseString("bc"),这时候传入的 str 长度依旧不为 1,所以执行 reverseString(str.substr(1)),其中 str.substr(1) 为 "c" reverseString("c"),这时候传入的 str 长度为 1,所以执行 if 中的部分,返回传入的 str,也就是返回 "c" 回到reverseString("bc") 这一步,此时的 str[0] 为 "b"。由于上...
classSolution {public:voidreverseString(vector<char>&s) {intleft =0, right = (int)s.size() -1;while(left <right) { swap(s[left++], s[right--]); } } }; Github 同步地址: https://github.com/grandyang/leetcode/issues/344 类似题目: Reverse Words in a String II Reverse Words in ...
Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order. Example 1: Input: "Let's take LeetCode contest" Output: "s'teL ekat edoCteeL tsetnoc" Note: In the string, each word is separated by si...
Explanation: The vowels insare['I', 'e', 'e', 'A']. On reversing the vowels, s becomes"AceCreIm". Example 2: Input:s = "leetcode" Output:"leotcede" Constraints: 1 <= s.length <= 3 * 105 sconsist ofprintable ASCIIcharacters....
Leetcode: Reverse Words in a String 题目: Given an input string, reverse the string word by word. For example, Given s = “the sky is blue”, return “blue is sky the”. 思路一: 先休整下给定的字符串,去掉其中的多于一个的空格,就是使所有单词之间的空格都变成一个,然后去掉最后面的空格,...
链滴Reverse Words in a String III--leetcode 作者:moloee 原文链接:https://ld246.com/article/1509275957069 来源网站:链滴 许可协议:署名-相同方式共享 4.0 国际 (CC BY-SA 4.0) 题目 Given a string, you need to reverse the order of characters in each word within a sentence whi e still ...
Can you solve this real interview question? Reverse Words in a String III - Given a string s, reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order. Example 1: Input: s = "Let's take
Write a function that takes a string as input and reverse only the vowels of a string. Example 1: Givens = "hello", return "holle". Example 2: Givens = "leetcode", return "leotcede". Note 第一种解法:将字符串转化为字符数组,用一头一尾两个指针向中间夹逼,遇到两个元音字母就进行位置交换...
题目:Reverse String(反转字符串) Write a function that reverses a string. The input string is given as an array of characterschar[]. Do not allocate extra space for another array, you must do this bymodifying the input array in-placewith O(1) extra memory. ...