leetcode-problemset/leetcode-cn/originData/permutation-ii-lcci.json

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            "questionId": "100348",
            "questionFrontendId": "面试题 08.08",
            "categoryTitle": "LCCI",
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            "title": "Permutation II LCCI",
            "titleSlug": "permutation-ii-lcci",
            "content": "<p>Write a method to compute all permutations of a string whose characters are not necessarily unique. The list of permutations should not have duplicates.</p>\r\n\r\n<p><strong>Example1:</strong></p>\r\n\r\n<pre>\r\n<strong> Input</strong>: S = &quot;qqe&quot;\r\n<strong> Output</strong>: [&quot;eqq&quot;,&quot;qeq&quot;,&quot;qqe&quot;]\r\n</pre>\r\n\r\n<p><strong>Example2:</strong></p>\r\n\r\n<pre>\r\n<strong> Input</strong>: S = &quot;ab&quot;\r\n<strong> Output</strong>: [&quot;ab&quot;, &quot;ba&quot;]\r\n</pre>\r\n\r\n<p><strong>Note:</strong></p>\r\n\r\n<ol>\r\n\t<li>All characters are English letters.</li>\r\n\t<li><code>1 &lt;= S.length &lt;= 9</code></li>\r\n</ol>\r\n",
            "translatedTitle": "有重复字符串的排列组合",
            "translatedContent": "<p>有重复字符串的排列组合。编写一种方法，计算某字符串的所有排列组合。</p>\n\n<p><strong>示例1:</strong></p>\n\n<pre><strong> 输入</strong>：S = &quot;qqe&quot;\n<strong> 输出</strong>：[&quot;eqq&quot;,&quot;qeq&quot;,&quot;qqe&quot;]\n</pre>\n\n<p><strong>示例2:</strong></p>\n\n<pre><strong> 输入</strong>：S = &quot;ab&quot;\n<strong> 输出</strong>：[&quot;ab&quot;, &quot;ba&quot;]\n</pre>\n\n<p><strong>提示:</strong></p>\n\n<ol>\n\t<li>字符都是英文字母。</li>\n\t<li>字符串长度在[1, 9]之间。</li>\n</ol>\n",
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                    "code": "class Solution {\npublic:\n    vector<string> permutation(string S) {\n\n    }\n};",
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                    "code": "class Solution(object):\n    def permutation(self, S):\n        \"\"\"\n        :type S: str\n        :rtype: List[str]\n        \"\"\"",
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            "hints": [
                "你可以通过在打印之前检查是否有重复内容（或将它们添加到列表中）来处理此问题。你可以用散列表来做到这一点。在什么情况下，这样是可以的？在什么情况下，这可能不是一个很好的解法？",
                "如果你还没有解决8.7的问题，就先解决那个。",
                "试着获得每个字符的计数。例如，abcaac有3个a、2个c和1个b。",
                "要得到3个a、2个c和1个b的全排列，你首先需要选择一个起始字符：a、b或c。如果是a，那么你需要2个a、2个c和1个b的全排列。"
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