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leetcode-problemset/leetcode-cn/originData/biao-shi-shu-zhi-de-zi-fu-chuan-lcof.json
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{
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"question": {
"questionId": "100290",
"questionFrontendId": "LCR 138",
"categoryTitle": "Algorithms",
"boundTopicId": 86224,
"title": "有效数字",
"titleSlug": "biao-shi-shu-zhi-de-zi-fu-chuan-lcof",
"content": "<p>English description is not available for the problem. Please switch to Chinese.</p>\r\n",
"translatedTitle": "有效数字",
"translatedContent": "<p><strong>有效数字</strong>(按顺序)可以分成以下几个部分:</p>\n\n<ol>\n\t<li>若干空格</li>\n\t<li>一个 <strong>小数</strong> 或者 <strong>整数</strong></li>\n\t<li>(可选)一个 <code>'e'</code> 或 <code>'E'</code> ,后面跟着一个 <strong>整数</strong></li>\n\t<li>若干空格</li>\n</ol>\n\n<p><strong>小数</strong>(按顺序)可以分成以下几个部分:</p>\n\n<ol>\n\t<li>(可选)一个符号字符(<code>'+'</code> 或 <code>'-'</code></li>\n\t<li>下述格式之一:\n\t<ol>\n\t\t<li>至少一位数字,后面跟着一个点 <code>'.'</code></li>\n\t\t<li>至少一位数字,后面跟着一个点 <code>'.'</code> ,后面再跟着至少一位数字</li>\n\t\t<li>一个点 <code>'.'</code> ,后面跟着至少一位数字</li>\n\t</ol>\n\t</li>\n</ol>\n\n<p><strong>整数</strong>(按顺序)可以分成以下几个部分:</p>\n\n<ol>\n\t<li>(可选)一个符号字符(<code>'+'</code> 或 <code>'-'</code></li>\n\t<li>至少一位数字</li>\n</ol>\n\n<p>部分有效数字列举如下:<code>[\"2\", \"0089\", \"-0.1\", \"+3.14\", \"4.\", \"-.9\", \"2e10\", \"-90E3\", \"3e+7\", \"+6e-1\", \"53.5e93\", \"-123.456e789\"]</code></p>\n\n<p>部分无效数字列举如下:<code>[\"abc\", \"1a\", \"1e\", \"e3\", \"99e2.5\", \"--6\", \"-+3\", \"95a54e53\"]</code></p>\n\n<p>给你一个字符串 <code>s</code> ,如果 <code>s</code> 是一个 <strong>有效数字</strong> ,请返回 <code>true</code> 。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n\n<pre>\n<strong>输入:</strong>s = \"0\"\n<strong>输出:</strong>true\n</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre>\n<strong>输入:</strong>s = \"e\"\n<strong>输出:</strong>false\n</pre>\n\n<p><strong>示例 3</strong></p>\n\n<pre>\n<strong>输入:</strong>s = \".\"\n<strong>输出:</strong>false\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;= 20</code></li>\n\t<li><code>s</code> 仅含英文字母(大写和小写),数字(<code>0-9</code>),加号 <code>'+'</code> ,减号 <code>'-'</code> ,空格 <code>' '</code> 或者点 <code>'.'</code> 。</li>\n</ul>\n\n<p>&nbsp;</p>\n",
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