leetcode-problemset/leetcode-cn/originData/calculator-lcci.json

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            "questionId": "1000027",
            "questionFrontendId": "面试题 16.26",
            "categoryTitle": "LCCI",
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            "title": "Calculator LCCI",
            "titleSlug": "calculator-lcci",
            "content": "<p>Given an arithmetic equation consisting of positive integers, +, -, * and / (no paren&shy;theses), compute the result.</p>\r\n\r\n<p>The expression string contains only non-negative integers, +, -, *, / operators and empty spaces . The integer division should truncate toward zero.</p>\r\n\r\n<p><strong>Example&nbsp;1:</strong></p>\r\n\r\n<pre>\r\n<strong>Input: </strong>&quot;3+2*2&quot;\r\n<strong>Output:</strong> 7\r\n</pre>\r\n\r\n<p><strong>Example 2:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> &quot; 3/2 &quot;\r\n<strong>Output:</strong> 1</pre>\r\n\r\n<p><strong>Example 3:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> &quot; 3+5 / 2 &quot;\r\n<strong>Output:</strong> 5\r\n</pre>\r\n\r\n<p><strong>Note:</strong></p>\r\n\r\n<ul>\r\n\t<li>You may assume that the given expression is always valid.</li>\r\n\t<li>Do not use the eval built-in library function.</li>\r\n</ul>\r\n",
            "translatedTitle": "计算器",
            "translatedContent": "<p>给定一个包含正整数、加(+)、减(-)、乘(*)、除(/)的算数表达式(括号除外)，计算其结果。</p>\n\n<p>表达式仅包含非负整数，<code>+</code>， <code>-</code> ，<code>*</code>，<code>/</code> 四种运算符和空格&nbsp;<code>&nbsp;</code>。 整数除法仅保留整数部分。</p>\n\n<p><strong>示例&nbsp;1:</strong></p>\n\n<pre><strong>输入: </strong>&quot;3+2*2&quot;\n<strong>输出:</strong> 7\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre><strong>输入:</strong> &quot; 3/2 &quot;\n<strong>输出:</strong> 1</pre>\n\n<p><strong>示例 3:</strong></p>\n\n<pre><strong>输入:</strong> &quot; 3+5 / 2 &quot;\n<strong>输出:</strong> 5\n</pre>\n\n<p><strong>说明：</strong></p>\n\n<ul>\n\t<li>你可以假设所给定的表达式都是有效的。</li>\n\t<li>请<strong>不要</strong>使用内置的库函数 <code>eval</code>。</li>\n</ul>\n",
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            "hints": [
                "我们可以从左到右处理表达式吗？为什么会失败？",
                "乘法和除法是优先级较高的运算。在3*4 + 5*9/2 + 3这样的表达式中，乘法和除法部分需要组合在一起。",
                "把它想成当你遇到乘法或除法时，跳至一个单独的“进程”来计算该结果。",
                "你还可以维护两个栈，一个用于操作符，另一个用于数字。每次看到一个数字，就把它压入栈。那么操作符呢？什么时候从栈中取出操作符并将它们与数字进行计算？"
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