self.reverseStrs(l, 0, len(l) - 1) # 2.翻转字符 # ['y', 'a', 'd', 'o', 't', ' ', 'g', 'n', 'i', 'n', 'i', 'a', 'r', ' ', 's', 'i', ' ', 't', 'i'] self.reverseEachWord(l) # 3.翻转每个单词 # ['t', 'o', 'd', 'a', 'y', ' ',...
https://leetcode.com/problems/reverse-words-in-a-string/?tab=Description 做法1 先整体反转 再定位到每一个word,做局部反转,同时in-place挪走空格 最后pop掉尾巴的空格 Time complexity: O(n) Space complexity: O(1) classSolution{public:voidreverseWords(string &s){for(inti =0, j = s.size() -...
如下图所示,分隔" I love cmu "的结果是:"" "I" "love" "cmu" View Code GITHUB: https://github.com/yuzhangcmu/LeetCode_algorithm/blob/master/string/ReverseWords.java
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,...
思路:大体为使用链表栈进行先进后出的操作方式。 直接上代码: /* Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky the". */ #include <stdio.h> #include <string.h> ...
反转可以用一个函数reverse实现。 找每个需要反转的单词可以通过双指针结合游标的方式实现。 public voidreverseWords(char[]str){if(str==null||str.length==0){return;}reverse(str,0,str.length-1);//寻找单词的双指针,i是游标int wordStart=0,wordEnd=0;for(int i=0;i<str.length;i++){if(str[i...
[LeetCode]Reverse Words in a String 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”. 把句子看做由词组成的,例如“A B C”,因此可以将句子的所有字符前后交换,得到“C’ B’ A...
[LeetCode] 186. Reverse Words in a String II Given an input string, reverse the string word by word. A word is defined as a sequence of non-space characters. The input string does not contain leading or trailing spaces and the words are always separated by a single space....
原问题链接:https://leetcode.com/problems/reverse-words-in-a-string/ 问题分析 这个问题的思路其实比较简单,因为它只是要把一个字符串里所有非空格的词语顺序给倒过来。那么我们就有这么一个基本的思路,首先将这个串按照空格给划分成多个非空的字符串。然后从后往前将字符串加入到一个StringBuilder中。最后去除两...
Reverse Words in a String III 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 ...