{"id":597,"date":"2020-09-26T11:01:40","date_gmt":"2020-09-26T03:01:40","guid":{"rendered":"http:\/\/39.96.58.60\/?p=597"},"modified":"2022-10-18T16:45:05","modified_gmt":"2022-10-18T08:45:05","slug":"leetcode-47-%e5%85%a8%e6%8e%92%e5%88%97-ii","status":"publish","type":"post","link":"https:\/\/www.yatenglg.cn\/blog\/?p=597","title":{"rendered":"Leetcode 47. \u5168\u6392\u5217 II"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u53ef\u5305\u542b\u91cd\u590d\u6570\u5b57\u7684\u5e8f\u5217\uff0c\u8fd4\u56de\u6240\u6709\u4e0d\u91cd\u590d\u7684\u5168\u6392\u5217\u3002<\/p>\n<p><strong>\u793a\u4f8b:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> [1,1,2]\n\n<strong>\u8f93\u51fa:<\/strong>\n\n[\n\n  [1,1,2],\n\n  [1,2,1],\n\n  [2,1,1]\n\n]<\/pre>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u56de\u6eaf\u7b97\u6cd5\u3001<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism undefined-numbers lang-python\" data-lang=\"Python\"><code>\n# -*- coding: utf-8 -*-\n# @Author  : LG\n\n\"\"\"\n\u6267\u884c\u7528\u65f6\uff1a60 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8643.34% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a14.1 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8617.94% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u56de\u6eaf\n    \u7531\u4e8e\u9898\u4e2d\u5b58\u5728\u91cd\u590d\u5143\u7d20\uff0c\u9700\u8981\u5bf9\u91cd\u590d\u5143\u7d20\u8fdb\u884c\u8df3\u8fc7\n\n\"\"\"\nclass Solution:\n    def permuteUnique(self, nums: List[int]) -&gt; List[List[int]]:\n        nums.sort() # \u5b58\u5728\u91cd\u590d\u7684\uff0c\u5148\u8fdb\u884c\u6392\u5e8f\uff0c\u540e\u7eed\u4fbf\u4e8e\u53bb\u91cd\n        n = len(nums)\n        result = []\n\n        def backtrack(current:list, used:list):\n            print(current)\n            if len(current) &gt;= n:\n                result.append(current[:])\n                return\n            for i in range(n):\n                if i &gt; 0 and i-1 not in used and nums[i]==nums[i-1]:    # \u53bb\u91cd\uff0c\u53bb\u91cd\u65f6\uff0c\u9700\u8981\u5224\u65ad\u524d\u4e00\u4e2a\u6570\u5b57\u662f\u5426\u5df2\u88ab\u4f7f\u7528\n                    continue\n                if i not in used:\n                    current.append(nums[i])\n                    used.append(i)\n                    backtrack(current, used)\n                    current.pop()\n                    used.pop()\n\n        backtrack([], [])\n\n        return result<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u53ef\u5305\u542b\u91cd\u590d\u6570\u5b57\u7684\u5e8f\u5217\uff0c\u8fd4\u56de\u6240\u6709\u4e0d\u91cd\u590d\u7684\u5168\u6392\u5217\u3002 \u793a\u4f8b: \u8f93\u5165: [1,1,2] \u8f93\u51fa: [ [1,1,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/597"}],"collection":[{"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=597"}],"version-history":[{"count":1,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/597\/revisions"}],"predecessor-version":[{"id":598,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/597\/revisions\/598"}],"wp:attachment":[{"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}