{"id":691,"date":"2020-09-26T11:11:28","date_gmt":"2020-09-26T03:11:28","guid":{"rendered":"http:\/\/39.96.58.60\/?p=691"},"modified":"2022-10-18T16:38:16","modified_gmt":"2022-10-18T08:38:16","slug":"leetcode-90-%e5%ad%90%e9%9b%86-ii","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=691","title":{"rendered":"Leetcode 90. \u5b50\u96c6 II"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u53ef\u80fd\u5305\u542b\u91cd\u590d\u5143\u7d20\u7684\u6574\u6570\u6570\u7ec4 <em><strong>nums<\/strong><\/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> [1,2,2]\n\n<strong>\u8f93\u51fa:<\/strong>\n\n[\n\n  [2],\n\n  [1],\n\n  [1,2,2],\n\n  [2,2],\n\n  [1,2],\n\n  []\n\n]<\/pre>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \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\uff1a32 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8698.41% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.9 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8628.77% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u56de\u6eaf\n    \u5148\u6392\u5e8f\uff0c\u6307\u5b9a\u8d77\u59cb\u5143\u7d20\u4e0b\u6807\uff0c\u8df3\u8fc7\u91cd\u590d\u5143\u7d20\n\"\"\"\nclass Solution:\n    def subsetsWithDup(self, nums: List[int]) -&gt; List[List[int]]:\n        nums.sort()     # \u5148\u6392\u5e8f\uff0c\u4fbf\u4e8e\u5904\u7406\u91cd\u590d\u5143\u7d20\n        n = len(nums)\n        result = []\n        def backtrack(i, current):  # \u4ece\u7b2ci\u4e2a\u5143\u7d20\u4f5c\u4e3a\u8d77\u59cb\n            result.append(current[:])\n            for j in range(i, n):\n                if j &gt; i and nums[j] == nums[j - 1]:    # \u5982\u679c\u9047\u5230\u91cd\u590d\u7684\u5143\u7d20\u5219\u8df3\u8fc7\n                    continue\n                current.append(nums[j])\n                backtrack(j + 1, current)   # \u4e0b\u4e00\u4e2a\u5143\u7d20\n                current.pop()   # \u56de\u6eaf\n        backtrack(0, [])\n        return result<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u53ef\u80fd\u5305\u542b\u91cd\u590d\u5143\u7d20\u7684\u6574\u6570\u6570\u7ec4 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\u7684\u5b50\u96c6&#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":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/691"}],"collection":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=691"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/691\/revisions"}],"predecessor-version":[{"id":692,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/691\/revisions\/692"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=691"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}