[LeetCode]#557. Reverse Words in a String III

Environment: Python 3.7

Key technique: .split , list

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"

Analysis:

1. Use .split(“ “) to separate input based on “ “
2. tmp=[“ let’s”, “take”, “leetCode”, “contest”]
3. Use for loop ans=ans+tmp[i][::-1]+” “
4. the last loop ans=ans+tmp[i][::-1]
5. return ans

Solution:

class Solution:
    def reverseWords(self, s):
        tmp=s.split(" ")
        ans=""
        for i in range(len(tmp)):
            if i==(len(tmp)-1):
                ans=ans+tmp[i][::-1]
            else:
                ans=ans+tmp[i][::-1]+" "
        return ans

Submissions: