[LeetCode&Python] Problem 557. Reverse Words in a String III

Posted 2021-01-08

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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鈥榮 take LeetCode contest"
Output: "s鈥榯eL ekat edoCteeL tsetnoc"

 

Note: In the string, each word is separated by single space and there will not be any extra space in the string.

 

My first solution:

class Solution:
    def reverseWords(self, s):
        """
        :type s: str
        :rtype: str
        """
        answer=鈥樷€?        smallstr=鈥樷€?        
        for c in s:
            if c==鈥?鈥?
                smallstr=smallstr[::-1]
                answer=answer+smallstr+鈥?鈥?                smallstr=鈥樷€?            else:
                smallstr=smallstr+c
                
        return answer+smallstr[::-1

銆€銆€

A much shorter solution:

class Solution:
    def reverseWords(self, s):
        """
        :type s: str
        :rtype: str
        """
        
        return 鈥?鈥?join(i[::-1] for i in s.split(鈥?鈥?)

銆€銆€