{"id":689,"date":"2020-09-26T11:11:17","date_gmt":"2020-09-26T03:11:17","guid":{"rendered":"http:\/\/39.96.58.60\/?p=689"},"modified":"2022-10-18T16:38:16","modified_gmt":"2022-10-18T08:38:16","slug":"leetcode-78-%e5%ad%90%e9%9b%86","status":"publish","type":"post","link":"https:\/\/www.yatenglg.cn\/blog\/?p=689","title":{"rendered":"Leetcode 78. \u5b50\u96c6"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u7ec4<strong>\u4e0d\u542b\u91cd\u590d\u5143\u7d20<\/strong>\u7684\u6574\u6570\u6570\u7ec4&nbsp;<em>nums<\/em>\uff0c\u8fd4\u56de\u8be5\u6570\u7ec4\u6240\u6709\u53ef\u80fd\u7684\u5b50\u96c6\uff08\u5e42\u96c6\uff09\u3002<\/p>\n<p><strong>\u8bf4\u660e\uff1a<\/strong>\u89e3\u96c6\u4e0d\u80fd\u5305\u542b\u91cd\u590d\u7684\u5b50\u96c6\u3002<\/p>\n<p><strong>\u793a\u4f8b:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> nums = [1,2,3]\n\n<strong>\u8f93\u51fa:<\/strong>\n\n[\n\n  [3],\n\n&nbsp; [1],\n\n&nbsp; [2],\n\n&nbsp; [1,2,3],\n\n&nbsp; [1,3],\n\n&nbsp; [2,3],\n\n&nbsp; [1,2],\n\n&nbsp; []\n\n]<\/pre>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u4f4d\u8fd0\u7b97\u3001 \u6570\u7ec4\u3001 \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\uff1a28 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8699.34% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.8 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8663.97% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u56de\u6eaf\n\"\"\"\nclass Solution:\n    def subsets(self, nums: List[int]) -&gt; List[List[int]]:\n        n = len(nums)\n        result = []\n        def backtrack(i, current):  # \u4ece\u7b2ci\u4e2a\u5143\u7d20\u5f00\u59cb\n            # print(current)\n            result.append(current[:])\n            if i &gt;= n:  # \u5f53\u904d\u5386\u5230\n                return\n\n            for j in range(i, n):\n                current.append(nums[j])\n                backtrack(j + 1, current)   # \u4e0b\u4e00\u4e2a\n                current.pop()               # \u56de\u6eaf\n\n        backtrack(0, [])\n        return result<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u7ec4\u4e0d\u542b\u91cd\u590d\u5143\u7d20\u7684\u6574\u6570\u6570\u7ec4&nbsp;nums\uff0c\u8fd4\u56de\u8be5\u6570\u7ec4\u6240\u6709\u53ef\u80fd\u7684\u5b50\u96c6\uff08\u5e42\u96c6\uff09\u3002 \u8bf4\u660e\uff1a\u89e3\u96c6\u4e0d\u80fd\u5305\u542b\u91cd\u590d&#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\/689"}],"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=689"}],"version-history":[{"count":1,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/689\/revisions"}],"predecessor-version":[{"id":690,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/689\/revisions\/690"}],"wp:attachment":[{"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}