leetcode-problemset/leetcode-cn/originData/string-to-integer-atoi.json

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            "questionId": "8",
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            "categoryTitle": "Algorithms",
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            "title": "String to Integer (atoi)",
            "titleSlug": "string-to-integer-atoi",
            "content": "<p>Implement the <code>myAtoi(string s)</code> function, which converts a string to a 32-bit signed integer (similar to C/C++&#39;s <code>atoi</code> function).</p>\n\n<p>The algorithm for <code>myAtoi(string s)</code> is as follows:</p>\n\n<ol>\n\t<li>Read in and ignore any leading whitespace.</li>\n\t<li>Check if the next character (if not already at the end of the string) is <code>&#39;-&#39;</code> or <code>&#39;+&#39;</code>. Read this character in if it is either. This determines if the final result is negative or positive respectively. Assume the result is positive if neither is present.</li>\n\t<li>Read in next the characters until the next non-digit character or the end of the input is reached. The rest of the string is ignored.</li>\n\t<li>Convert these digits into an integer (i.e. <code>&quot;123&quot; -&gt; 123</code>, <code>&quot;0032&quot; -&gt; 32</code>). If no digits were read, then the integer is <code>0</code>. Change the sign as necessary (from step 2).</li>\n\t<li>If the integer is out of the 32-bit signed integer range <code>[-2<sup>31</sup>, 2<sup>31</sup> - 1]</code>, then clamp the integer so that it remains in the range. Specifically, integers less than <code>-2<sup>31</sup></code> should be clamped to <code>-2<sup>31</sup></code>, and integers greater than <code>2<sup>31</sup> - 1</code> should be clamped to <code>2<sup>31</sup> - 1</code>.</li>\n\t<li>Return the integer as the final result.</li>\n</ol>\n\n<p><strong>Note:</strong></p>\n\n<ul>\n\t<li>Only the space character <code>&#39; &#39;</code> is considered a whitespace character.</li>\n\t<li><strong>Do not ignore</strong> any characters other than the leading whitespace or the rest of the string after the digits.</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;42&quot;\n<strong>Output:</strong> 42\n<strong>Explanation:</strong> The underlined characters are what is read in, the caret is the current reader position.\nStep 1: &quot;42&quot; (no characters read because there is no leading whitespace)\n         ^\nStep 2: &quot;42&quot; (no characters read because there is neither a &#39;-&#39; nor &#39;+&#39;)\n         ^\nStep 3: &quot;<u>42</u>&quot; (&quot;42&quot; is read in)\n           ^\nThe parsed integer is 42.\nSince 42 is in the range [-2<sup>31</sup>, 2<sup>31</sup> - 1], the final result is 42.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;   -42&quot;\n<strong>Output:</strong> -42\n<strong>Explanation:</strong>\nStep 1: &quot;<u>   </u>-42&quot; (leading whitespace is read and ignored)\n            ^\nStep 2: &quot;   <u>-</u>42&quot; (&#39;-&#39; is read, so the result should be negative)\n             ^\nStep 3: &quot;   -<u>42</u>&quot; (&quot;42&quot; is read in)\n               ^\nThe parsed integer is -42.\nSince -42 is in the range [-2<sup>31</sup>, 2<sup>31</sup> - 1], the final result is -42.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;4193 with words&quot;\n<strong>Output:</strong> 4193\n<strong>Explanation:</strong>\nStep 1: &quot;4193 with words&quot; (no characters read because there is no leading whitespace)\n         ^\nStep 2: &quot;4193 with words&quot; (no characters read because there is neither a &#39;-&#39; nor &#39;+&#39;)\n         ^\nStep 3: &quot;<u>4193</u> with words&quot; (&quot;4193&quot; is read in; reading stops because the next character is a non-digit)\n             ^\nThe parsed integer is 4193.\nSince 4193 is in the range [-2<sup>31</sup>, 2<sup>31</sup> - 1], the final result is 4193.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>0 &lt;= s.length &lt;= 200</code></li>\n\t<li><code>s</code> consists of English letters (lower-case and upper-case), digits (<code>0-9</code>), <code>&#39; &#39;</code>, <code>&#39;+&#39;</code>, <code>&#39;-&#39;</code>, and <code>&#39;.&#39;</code>.</li>\n</ul>\n",
            "translatedTitle": "字符串转换整数 (atoi)",
            "translatedContent": "<p>请你来实现一个&nbsp;<code>myAtoi(string s)</code>&nbsp;函数，使其能将字符串转换成一个 32 位有符号整数（类似 C/C++ 中的 <code>atoi</code> 函数）。</p>\n\n<p>函数&nbsp;<code>myAtoi(string s)</code> 的算法如下：</p>\n\n<ol>\n\t<li>读入字符串并丢弃无用的前导空格</li>\n\t<li>检查下一个字符（假设还未到字符末尾）为正还是负号，读取该字符（如果有）。 确定最终结果是负数还是正数。 如果两者都不存在，则假定结果为正。</li>\n\t<li>读入下一个字符，直到到达下一个非数字字符或到达输入的结尾。字符串的其余部分将被忽略。</li>\n\t<li>将前面步骤读入的这些数字转换为整数（即，\"123\" -&gt; 123， \"0032\" -&gt; 32）。如果没有读入数字，则整数为 <code>0</code> 。必要时更改符号（从步骤 2 开始）。</li>\n\t<li>如果整数数超过 32 位有符号整数范围 <code>[−2<sup>31</sup>,&nbsp; 2<sup>31&nbsp;</sup>− 1]</code> ，需要截断这个整数，使其保持在这个范围内。具体来说，小于 <code>−2<sup>31</sup></code> 的整数应该被固定为 <code>−2<sup>31</sup></code> ，大于 <code>2<sup>31&nbsp;</sup>− 1</code> 的整数应该被固定为 <code>2<sup>31&nbsp;</sup>− 1</code> 。</li>\n\t<li>返回整数作为最终结果。</li>\n</ol>\n\n<p><strong>注意：</strong></p>\n\n<ul>\n\t<li>本题中的空白字符只包括空格字符 <code>' '</code> 。</li>\n\t<li>除前导空格或数字后的其余字符串外，<strong>请勿忽略</strong> 任何其他字符。</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>示例&nbsp;1：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"42\"\n<strong>输出：</strong>42\n<strong>解释：</strong>加粗的字符串为已经读入的字符，插入符号是当前读取的字符。\n第 1 步：\"42\"（当前没有读入字符，因为没有前导空格）\n         ^\n第 2 步：\"42\"（当前没有读入字符，因为这里不存在 '-' 或者 '+'）\n         ^\n第 3 步：\"<u>42</u>\"（读入 \"42\"）\n           ^\n解析得到整数 42 。\n由于 \"42\" 在范围 [-2<sup>31</sup>, 2<sup>31</sup> - 1] 内，最终结果为 42 。</pre>\n\n<p><strong>示例&nbsp;2：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"   -42\"\n<strong>输出：</strong>-42\n<strong>解释：</strong>\n第 1 步：\"<u><strong>   </strong></u>-42\"（读入前导空格，但忽视掉）\n            ^\n第 2 步：\"   <u><strong>-</strong></u>42\"（读入 '-' 字符，所以结果应该是负数）\n             ^\n第 3 步：\"   <u><strong>-42</strong></u>\"（读入 \"42\"）\n               ^\n解析得到整数 -42 。\n由于 \"-42\" 在范围 [-2<sup>31</sup>, 2<sup>31</sup> - 1] 内，最终结果为 -42 。\n</pre>\n\n<p><strong>示例&nbsp;3：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"4193 with words\"\n<strong>输出：</strong>4193\n<strong>解释：</strong>\n第 1 步：\"4193 with words\"（当前没有读入字符，因为没有前导空格）\n         ^\n第 2 步：\"4193 with words\"（当前没有读入字符，因为这里不存在 '-' 或者 '+'）\n         ^\n第 3 步：\"<u>4193</u> with words\"（读入 \"4193\"；由于下一个字符不是一个数字，所以读入停止）\n             ^\n解析得到整数 4193 。\n由于 \"4193\" 在范围 [-2<sup>31</sup>, 2<sup>31</sup> - 1] 内，最终结果为 4193 。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>0 &lt;= s.length &lt;= 200</code></li>\n\t<li><code>s</code> 由英文字母（大写和小写）、数字（<code>0-9</code>）、<code>' '</code>、<code>'+'</code>、<code>'-'</code> 和 <code>'.'</code> 组成</li>\n</ul>\n",
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href=\\\"https:\\/\\/github.com\\/emirpasic\\/gods\\/tree\\/v1.18.1\\\" target=\\\"_blank\\\">https:\\/\\/godoc.org\\/github.com\\/emirpasic\\/gods@v1.18.1<\\/a> \\u7b2c\\u4e09\\u65b9\\u5e93\\u3002<\\/p>\"],\"python3\":[\"Python3\",\"<p>\\u7248\\u672c\\uff1a<code>Python 3.10<\\/code><\\/p>\\r\\n\\r\\n<p>\\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982<a href=\\\"https:\\/\\/docs.python.org\\/3\\/library\\/array.html\\\" target=\\\"_blank\\\">array<\\/a>, <a href=\\\"https:\\/\\/docs.python.org\\/3\\/library\\/bisect.html\\\" target=\\\"_blank\\\">bisect<\\/a>, <a href=\\\"https:\\/\\/docs.python.org\\/3\\/library\\/collections.html\\\" target=\\\"_blank\\\">collections<\\/a>\\u3002 \\u5982\\u679c\\u60a8\\u9700\\u8981\\u4f7f\\u7528\\u5176\\u4ed6\\u5e93\\u51fd\\u6570\\uff0c\\u8bf7\\u81ea\\u884c\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n<p>\\u5982\\u9700\\u4f7f\\u7528 Map\\/TreeMap 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