Leetcode学习(6)—— Reverse Words in a String III

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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.

Input: "Let's take LeetCode contest"Output: "s'teL 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.

思路:用空格拆分字符串,反转每一个单词,再 join 成一个新的字符串

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