Could the input string contain leading or trailing spaces? Yes. However, your reversed string should not contain leading or trailing spaces. How about multiple spaces between two words? Reduce them to a single space in the reversed string. 题解: 一个用了java的s.split(" "),按空格分隔。 然...
将s按照空格拆分为字符串数组,然后对数组中的每一个元素做翻转,再以空格拼接,作为结果返回。 publicStringreverseWords(Strings) {String[] arr = s.split(" ");StringBuilderresult =newStringBuilder();for(int i=0; i<arr.length; i++) {Stringss = arr[i];StringBuildersb =newStringBuilder(ss); sb....
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 Top Interview Questions 344. Reverse String (Java版; Easy) 题目描述 AI检测代码解析 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...
Can you solve this real interview question? Reverse Words in a String - Given an input string s, reverse the order of the words. A word is defined as a sequence of non-space characters. The words in s will be separated by at least one space. Return a s
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...
输入:“leetcode” 输出:“leotcede” 注意:元音不包括字母“y”。 本次解题使用的开发工具是eclipse,jdk使用的版本是1.8,环境是win7 64位系统,使用Java语言编写和测试。 02 第一种解法 元音字母包含:a e i o u 这五个,利用栈先进后出的特性,把字符串转为字符数组,利用迭代,遇到五个元音字母(包含大小写...
Write a function that takes a string as input and reverse only the vowels of a string. Example 1: Given s = "hello", return "holle". Example 2: Given s = "leetcode", return "leotcede". Note: The vowels does not include the letter "y". ...
Code C++ 栈 1 139 0LSY ・ 2024.12.31 150. 逆波兰表达式求值 Problem: 思路 当遇到数字时直接进栈,不需要执行任何操作,若是运算符号,则取出栈顶的两个数组进行运算并将结果重新加入到栈中,直到tokens数组遍历完,栈中最后只存在一个数字即为运算答案。 C Java 数学 数组 栈 3 311 0Sheng...
元音字母包含大小写,元音字母有五个a,e,i,o,u 原文描述: Write a function that takes a string as input and reverse only the vowels of a string. Example 1: Given s = "hello", return "holle". Example 2: Given s = "leetcode", return "leotcede". Note: The vowels does not inc...