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. SOLUTION 1: 1. 先处理原字符串: 使用strim把前后的空格...
https://oj.leetcode.com/problems/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". publicclassSolution {publicstaticString reverseWords(String s) { String[] strs= s.split(" "); ...
# @return a string def reverseWords(self, s): if len(s) == 0: return '' words = s.split(' ') i = 0 while i < len(words): if words[i] == '': del words[i] else: i = i + 1 if len(words) == 0: return '' words.reverse() result = '' for item in words: resul...
Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky the". 1 public class Solution_Reserse { 2 public String reverseWords(String str){ 3 String str_result = ""; 4 String str_word = ""; 5 char array_src[] = ...
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 Python class to reverse a string word by word. Sample Solution: Python Code: classpy_solution:defreverse_words(self,s):return' '.join(reversed(s.split()))print(py_solution().reverse_words('hello .py')) Copy Sample Output: ...
Loop through each element in themessagearray, reverse it and store this element innewMessagearray. Join "word" strings from the arraynewMessage, using a space again, to create the desired single string to write to the console. The final result of this example solution. ...
Whether you get stuck and need to peek at the solution or you finish successfully, continue on to view a solution to this challenge.Next unit: Review a solution to the reverse words in a sentence challenge Continue Need help? See our troubleshooting guide or provide specific feedback by ...
Solution1 Code: publicclassSolution{publicStringreverseWords(Strings){if(s==null)returnnull;char[]a=s.toCharArray();intn=a.length;// step 1. reverse the whole stringreverse(a,0,n-1);// step 2. reverse each wordreverseWords(a,n);// step 3. clean up spacesreturncleanSpaces(a,n);}...
in-place算法一般要使用两个指针,一个指针负责遍历,另一个指针负责拷贝覆盖。 时间复杂度 O(n) 空间复杂度 O(1) 代码 classSolution{public:voidreverseWords(string&s){reverse(s.begin(),s.end());intk=0;for(inti=0;i<s.size();i++){if(s[i]!=' '){if(k!=0)s[k++]=' ';intj=i;whi...