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() -1; i < j; i++, j--) {swap(s[i], s[j]); }intnext_pos =0, start =0, end...
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,给最前面加一个空格。这样每次遇到空格的时候,前...
Collections.reverse(Arrays.asList(words));returnString.join(" ", words); } } 类似题目: Reverse Words in a String II 参考资料: https://discuss.leetcode.com/topic/3298/in-place-simple-solution https://discuss.leetcode.com/topic/2742/my-accepted-java-solution https://discuss.leetcode.com/t...
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 b...
Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky the". 注:该题目已有大神实现了,地址为 https://blog.csdn.net/lanxu_yy/article/details/38827845,但使用的是C++语言。
参考LeetCode #189 Rotate Array 旋转数组 先将整个字符串反转 再按空格反转每个单词并去掉额外的空格 时间复杂度O(n), 空间复杂度O(n) 代码: C++: class Solution{public:stringreverseWords(string s){stringstream ss;string result="",temp;ss<<s;while(ss>>temp)result=" "+temp+result;if(result.size...
LeetCode: 151. Reverse Words in a String LeetCode: 151. Reverse Words in a String 题目描述 Given an input string, reverse the string word by word. Example: Note: 解题思路 获取用空格分割开的单词,然后将他们的倒序插入结果串中。 AC 代码......
Reduce them to a single space in the reversed string. 原题地址 翻转字符串中的单词顺序,这是个老题目了。可是leetcode上面的要求更为严格。如: 要求把开头和结尾的空格删除掉; 缩减单词间的空格数为1(假设有多个空格)。 单词若全是空格,则返回一个空字符串(""). ...
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. 原问题链接:https://leetcode.com/problems/reverse-words-in-a-string/ ...
LeetCode 557. 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" ...