{"id":595,"date":"2020-09-26T11:01:28","date_gmt":"2020-09-26T03:01:28","guid":{"rendered":"http:\/\/39.96.58.60\/?p=595"},"modified":"2022-10-18T16:45:05","modified_gmt":"2022-10-18T08:45:05","slug":"leetcode-46-%e5%85%a8%e6%8e%92%e5%88%97","status":"publish","type":"post","link":"https:\/\/www.yatenglg.cn\/blog\/?p=595","title":{"rendered":"Leetcode 46. \u5168\u6392\u5217"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a<strong> \u6ca1\u6709\u91cd\u590d<\/strong> \u6570\u5b57\u7684\u5e8f\u5217\uff0c\u8fd4\u56de\u5176\u6240\u6709\u53ef\u80fd\u7684\u5168\u6392\u5217\u3002<\/p>\n<p><strong>\u793a\u4f8b:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> [1,2,3]\n\n<strong>\u8f93\u51fa:<\/strong>\n\n[\n\n  [1,2,3],\n\n  [1,3,2],\n\n  [2,1,3],\n\n  [2,3,1],\n\n  [3,1,2],\n\n  [3,2,1]\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\uff1a48 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8641.92% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.8 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8662.85% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u56de\u6eaf\n    \u5177\u4f53\u5b9e\u73b0\u89c1\u4ee3\u7801\n\"\"\"\nclass Solution:\n    def permute(self, nums: List[int]) -&gt; List[List[int]]:\n        n = len(nums)\n        result = []     # \u6700\u7ec8\u7ed3\u679c\n\n        def backtrack(current:list, used:list): # \u5f53\u524d\u5217\u8868\uff0c\u7528\u4e8e\u8bb0\u5f55\u4f7f\u7528\u8fc7\u7684\u6570\u7ec4\u7684\u5217\u8868\n            if len(current) &gt;= n:\n                result.append(current[:])\n                return\n\n            for i in range(n):  # \u5faa\u73af\u6bcf\u4e2a\u6570\u5b57\u4f5c\u4e3a\u8d77\u59cb\n                if nums[i] not in used: # \u5982\u679c\u5f53\u524d\u6570\u5b57\u6ca1\u6709\u4f7f\u7528\u8fc7\n                    current.append(nums[i]) # \u52a0\u5165\u5f53\u524d\u5217\u8868\n                    used.append(nums[i])    # \u8bb0\u5f55\u4e3a\u5df2\u4f7f\u7528\n                    backtrack(current, used)    # \u4e0b\u4e00\u4e2a\u6570\u5b57\n                    current.pop()   # \u56de\u6eaf\n                    used.pop()\n\n        backtrack([], [])\n\n        return result<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a \u6ca1\u6709\u91cd\u590d \u6570\u5b57\u7684\u5e8f\u5217\uff0c\u8fd4\u56de\u5176\u6240\u6709\u53ef\u80fd\u7684\u5168\u6392\u5217\u3002 \u793a\u4f8b: \u8f93\u5165: [1,2,3] \u8f93\u51fa: [ [1,2&#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\/595"}],"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=595"}],"version-history":[{"count":1,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/595\/revisions"}],"predecessor-version":[{"id":596,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/595\/revisions\/596"}],"wp:attachment":[{"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}