leetcode-problemset/leetcode-cn/originData/pattern-matching-lcci.json

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            "questionId": "1000004",
            "questionFrontendId": "面试题 16.18",
            "categoryTitle": "LCCI",
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            "title": "Pattern Matching LCCI",
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            "content": "<p>You are given two strings, pattern and value. The pattern string consists of just the letters a and b, describing a pattern within a string. For example, the string catcatgocatgo matches the pattern aabab (where cat is a and go is b). It also matches patterns like a, ab, and b. Write a method to determine if value matches pattern. a and b cannot be the same string.</p>\r\n\r\n<p><strong>Example 1: </strong></p>\r\n\r\n<pre>\r\n<strong>Input: </strong> pattern = &quot;abba&quot;, value = &quot;dogcatcatdog&quot;\r\n<strong>Output: </strong> true\r\n</pre>\r\n\r\n<p><strong>Example 2: </strong></p>\r\n\r\n<pre>\r\n<strong>Input: </strong> pattern = &quot;abba&quot;, value = &quot;dogcatcatfish&quot;\r\n<strong>Output: </strong> false\r\n</pre>\r\n\r\n<p><strong>Example 3: </strong></p>\r\n\r\n<pre>\r\n<strong>Input: </strong> pattern = &quot;aaaa&quot;, value = &quot;dogcatcatdog&quot;\r\n<strong>Output: </strong> false\r\n</pre>\r\n\r\n<p><strong>Example 4: </strong></p>\r\n\r\n<pre>\r\n<strong>Input: </strong> pattern = &quot;abba&quot;, value = &quot;dogdogdogdog&quot;\r\n<strong>Output: </strong> true\r\n<strong>Explanation: </strong> &quot;a&quot;=&quot;dogdog&quot;,b=&quot;&quot;，vice versa.\r\n</pre>\r\n\r\n<p><strong>Note: </strong></p>\r\n\r\n<ul>\r\n\t<li><code>0 &lt;= len(pattern) &lt;= 1000</code></li>\r\n\t<li><code>0 &lt;= len(value) &lt;= 1000</code></li>\r\n\t<li><code>pattern</code>&nbsp;only contains&nbsp;<code>&quot;a&quot;</code>&nbsp;and&nbsp;<code>&quot;b&quot;</code>,&nbsp;<code>value</code> only contains lowercase letters.</li>\r\n</ul>\r\n",
            "translatedTitle": "模式匹配",
            "translatedContent": "<p>你有两个字符串，即<code>pattern</code>和<code>value</code>。 <code>pattern</code>字符串由字母<code>&quot;a&quot;</code>和<code>&quot;b&quot;</code>组成，用于描述字符串中的模式。例如，字符串<code>&quot;catcatgocatgo&quot;</code>匹配模式<code>&quot;aabab&quot;</code>（其中<code>&quot;cat&quot;</code>是<code>&quot;a&quot;</code>，<code>&quot;go&quot;</code>是<code>&quot;b&quot;</code>），该字符串也匹配像<code>&quot;a&quot;</code>、<code>&quot;ab&quot;</code>和<code>&quot;b&quot;</code>这样的模式。但需注意<code>&quot;a&quot;</code>和<code>&quot;b&quot;</code>不能同时表示相同的字符串。编写一个方法判断<code>value</code>字符串是否匹配<code>pattern</code>字符串。</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre><strong>输入：</strong> pattern = &quot;abba&quot;, value = &quot;dogcatcatdog&quot;\n<strong>输出：</strong> true\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><strong>输入：</strong> pattern = &quot;abba&quot;, value = &quot;dogcatcatfish&quot;\n<strong>输出：</strong> false\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre><strong>输入：</strong> pattern = &quot;aaaa&quot;, value = &quot;dogcatcatdog&quot;\n<strong>输出：</strong> false\n</pre>\n\n<p><strong>示例 4：</strong></p>\n\n<pre><strong>输入：</strong> pattern = &quot;abba&quot;, value = &quot;dogdogdogdog&quot;\n<strong>输出：</strong> true\n<strong>解释：</strong> &quot;a&quot;=&quot;dogdog&quot;,b=&quot;&quot;，反之也符合规则\n</pre>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= len(pattern) &lt;= 1000</code></li>\n\t<li><code>0 &lt;= len(value) &lt;= 1000</code></li>\n\t<li>你可以假设<code>pattern</code>只包含字母<code>&quot;a&quot;</code>和<code>&quot;b&quot;</code>，<code>value</code>仅包含小写字母。</li>\n</ul>\n",
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            "hints": [
                "从蛮力解法开始。你能试一下a和b的所有可能性吗?",
                "观察其中一个子字符串，a或b都可以，必须从字符串的开头开始。这减少了可能性的种类。",
                "不要忘记处理pattern中的第一个字符是b的可能性。",
                "谨慎地选择分析时间复杂度的方式。如果遍历O(n2)个子字符串，每个子字符串都进行O(n)次的字符串比较，那么总体运行时间为O(n3)。",
                "假设你确定了一个模式中“a”部分的值。b有多少种可能性?",
                "由于a的值决定b的值（反之亦然），并且a或b必须出现于值的起始处，所以你应该只有O(n)种可能来分解模式串。",
                "你应该能够有一个O(n2)的算法。"
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