leetcode-problemset/leetcode-cn/originData/reverse-words-in-a-string.json

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            "questionId": "151",
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            "categoryTitle": "Algorithms",
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            "title": "Reverse Words in a String",
            "titleSlug": "reverse-words-in-a-string",
            "content": "<p>Given an input string <code>s</code>, reverse the order of the <strong>words</strong>.</p>\n\n<p>A <strong>word</strong> is defined as a sequence of non-space characters. The <strong>words</strong> in <code>s</code> will be separated by at least one space.</p>\n\n<p>Return <em>a string of the words in reverse order concatenated by a single space.</em></p>\n\n<p><b>Note</b> that <code>s</code> may contain leading or trailing spaces or multiple spaces between two words. The returned string should only have a single space separating the words. Do not include any extra spaces.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;the sky is blue&quot;\n<strong>Output:</strong> &quot;blue is sky the&quot;\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;  hello world  &quot;\n<strong>Output:</strong> &quot;world hello&quot;\n<strong>Explanation:</strong> Your reversed string should not contain leading or trailing spaces.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;a good   example&quot;\n<strong>Output:</strong> &quot;example good a&quot;\n<strong>Explanation:</strong> You need to reduce multiple spaces between two words to a single space in the reversed string.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 10<sup>4</sup></code></li>\n\t<li><code>s</code> contains English letters (upper-case and lower-case), digits, and spaces <code>&#39; &#39;</code>.</li>\n\t<li>There is <strong>at least one</strong> word in <code>s</code>.</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><b data-stringify-type=\"bold\">Follow-up:&nbsp;</b>If the string data type is mutable in your language, can&nbsp;you solve it&nbsp;<b data-stringify-type=\"bold\">in-place</b>&nbsp;with&nbsp;<code data-stringify-type=\"code\">O(1)</code>&nbsp;extra space?</p>\n",
            "translatedTitle": "颠倒字符串中的单词",
            "translatedContent": "<p>给你一个字符串 <code>s</code> ，颠倒字符串中 <strong>单词</strong> 的顺序。</p>\n\n<p><strong>单词</strong> 是由非空格字符组成的字符串。<code>s</code> 中使用至少一个空格将字符串中的 <strong>单词</strong> 分隔开。</p>\n\n<p>返回 <strong>单词</strong> 顺序颠倒且 <strong>单词</strong> 之间用单个空格连接的结果字符串。</p>\n\n<p><strong>注意：</strong>输入字符串 <code>s</code>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。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"<code>the sky is blue</code>\"\n<strong>输出：</strong>\"<code>blue is sky the</code>\"\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \" &nbsp;hello world &nbsp;\"\n<strong>输出：</strong>\"world hello\"\n<strong>解释：</strong>颠倒后的字符串中不能存在前导空格和尾随空格。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"a good &nbsp; example\"\n<strong>输出：</strong>\"example good a\"\n<strong>解释：</strong>如果两个单词间有多余的空格，颠倒后的字符串需要将单词间的空格减少到仅有一个。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 10<sup>4</sup></code></li>\n\t<li><code>s</code> 包含英文大小写字母、数字和空格 <code>' '</code></li>\n\t<li><code>s</code> 中 <strong>至少存在一个</strong> 单词</li>\n</ul>\n\n<ul>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>进阶：</strong>如果字符串在你使用的编程语言中是一种可变数据类型，请尝试使用&nbsp;<code>O(1)</code> 额外空间复杂度的 <strong>原地</strong> 解法。</p>\n",
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