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。
LeetCode 344 Reverse String 翻转字符串 描述 Write a function that reverses a string. The input string is given as an array of characters s. You must do this by modifying the input array in-place with O(1) extra memory. Example 1: Input: s = ["h","e","l","l","o"] Output: ...
方法二:双指针 C++代码: 1classSolution {2public:3voidreverseString(vector<char>&s) {4for(inti =0, j = s.size() -1; i < j; ++i,--j) {5swap(s[i], s[j]);//辅助变量实现、异或运算实现6}7}8}; python3代码: 1classSolution:2defreverseString(self, s: List[str]) ->None:3"...
public String reverseVowels(String s) { StringBuilder builder=new StringBuilder(s); int i=0; int j=builder.length()-1; while(i<j) { boolean a=isVowel(builder.charAt(i)); boolean b=isVowel(builder.charAt(j)); if(a&&b) { char tmp=builder.charAt(i); builder.setCharAt(i, builder.ch...
Can you solve this real interview question? Reverse String - Write a function that reverses a string. The input string is given as an array of characters s. You must do this by modifying the input array in-place [https://en.wikipedia.org/wiki/In-place_a
Reverse String 编程算法 Write a function that reverses a string. The input string is given as an array of characters char[]. 用户7447819 2021/07/23 1430 LeetCode 344. 反转字符串 编程算法 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。 freesan44 ...
力扣leetcode-cn.com/problems/reverse-vowels-of-a-string/ 题目描述 给你一个字符串 s ,仅反转字符串中的所有元音字母,并返回结果字符串。 元音字母包括 'a'、'e'、'i'、'o'、'u',且可能以大小写两种形式出现。 示例1: 输入:s = "hello" 输出:"holle" 示例2: 输入:s = "leetcode" 输出:...
Given an input string,reverse the string word by word.For example,Given s="the sky is blue",return"blue is sky the". 比较基础的一个题,拿到这个题,我的第一想法是利用vector来存每一个子串,然后在输出,这是一个比较简单的思路,此外,还有第二个思路,就是对所有的字符反转,然后在针对每一个子串反转...
151. Reverse Words in a String Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky the". 题目大意: 输入一个字符串,将单词序列反转。 思路1: 采用一个vector,来存放中间结果 ...
The string consists of lower English letters only. Length of the given string and k will in the range [1, 10000] 这道题是之前那道题Reverse String的拓展,同样是翻转字符串,但是这里是每隔k隔字符,翻转k个字符,最后如果不够k个了的话,剩几个就翻转几个。比较直接的方法就是先用n/k算出来原字符串...