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Leetcode 151. 颠倒字符串中的单词
2022-07-23 18:26:00 【我不是萧海哇~~~~】

给你一个字符串 s ,颠倒字符串中 单词 的顺序。
单词 是由非空格字符组成的字符串。s 中使用至少一个空格将字符串中的 单词 分隔开。
返回 单词 顺序颠倒且 单词 之间用单个空格连接的结果字符串。
注意:输入字符串 s中可能会存在前导空格、尾随空格或者单词间的多个空格。返回的结果字符串中,单词间应当仅用单个空格分隔,且不包含任何额外的空格。
示例 1:
输入:s = "the sky is blue"
输出:"blue is sky the"
示例 2:
输入:s = " hello world "
输出:"world hello"
解释:颠倒后的字符串中不能存在前导空格和尾随空格。
示例 3:
输入:s =边栏推荐
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