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"translatedContent": "<p>无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,字符串每个字符均不相同。</p>\n\n<p> <strong>示例1:</strong></p>\n\n<pre>\n<strong> 输入</strong>S = \"qwe\"\n<strong> 输出</strong>[\"qwe\", \"qew\", \"wqe\", \"weq\", \"ewq\", \"eqw\"]\n</pre>\n\n<p> <strong>示例2:</strong></p>\n\n<pre>\n<strong> 输入</strong>S = \"ab\"\n<strong> 输出</strong>[\"ab\", \"ba\"]\n</pre>\n\n<p> <strong>提示:</strong></p>\n\n<ol>\n<li>字符都是英文字母。</li>\n<li>字符串长度在[1, 9]之间。</li>\n</ol>\n",
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"difficulty": "Medium",
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"similarQuestions": "[]",
@@ -143,7 +143,7 @@
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"hints": [
"方法1假设你有abc的所有排列。你怎么用它来得到abcd的所有排列",
"方法1abc的排列组合表示abc的所有组合方式。现在我们要创建abcd的所有组合方式。选择abcd的特定组合如bdca。这个bdca字符串也代表abc的一种排列方式删除d你会得到bca。那么给定字符串bca你是否可以创建包含d 的所有“相关”排列组合?",