{"id":345,"date":"2020-09-26T10:29:12","date_gmt":"2020-09-26T02:29:12","guid":{"rendered":"http:\/\/39.96.58.60\/?p=345"},"modified":"2022-10-18T16:39:49","modified_gmt":"2022-10-18T08:39:49","slug":"leetcode-%e9%9d%a2%e8%af%95%e9%a2%98-08-09-%e6%8b%ac%e5%8f%b7","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=345","title":{"rendered":"Leetcode \u9762\u8bd5\u9898 08.09. \u62ec\u53f7"},"content":{"rendered":"<p>\u62ec\u53f7\u3002\u8bbe\u8ba1\u4e00\u79cd\u7b97\u6cd5\uff0c\u6253\u5370n\u5bf9\u62ec\u53f7\u7684\u6240\u6709\u5408\u6cd5\u7684\uff08\u4f8b\u5982\uff0c\u5f00\u95ed\u4e00\u4e00\u5bf9\u5e94\uff09\u7ec4\u5408\u3002<\/p>\n<p>\u8bf4\u660e\uff1a\u89e3\u96c6\u4e0d\u80fd\u5305\u542b\u91cd\u590d\u7684\u5b50\u96c6\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u7ed9\u51fa&nbsp;n = 3\uff0c\u751f\u6210\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>[\n\n  \"((()))\",\n\n  \"(()())\",\n\n  \"(())()\",\n\n  \"()(())\",\n\n  \"()()()\"\n\n]\n\n<\/pre>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u5b57\u7b26\u4e32\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\uff1a40 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8685.42% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.6 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8629.31% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u56de\u6eaf\n    \u5177\u4f53\u5b9e\u73b0\u89c1\u4ee3\u7801\u6ce8\u91ca\n\"\"\"\nclass Solution:\n    def generateParenthesis(self, n: int) -&gt; List[str]:\n        result = []\n        def backtrack(l, r, current):   # \u5269\u4f59\u5de6\u62ec\u53f7\u4e2a\u6570\uff0c\u5269\u4f59\u53f3\u62ec\u53f7\u4e2a\u6570\uff0c\u5f53\u524d\u62ec\u53f7\u7ec4\u5408\n            if l == 0 and r == 0:       # \u5982\u679c\u62ec\u53f7\u90fd\u7528\u5b8c\uff0c\u5219\u6dfb\u52a0\u5230\u6700\u7ec8\u7ed3\u679c\u4e2d\n                result.append(current[:])\n                return\n            if l &gt; r or l &lt; 0 or r &lt; 0: # \u5982\u679c\u5269\u4f59\u5de6\u62ec\u53f7\u6bd4\u5269\u4f59\u53f3\u62ec\u53f7\u591a\uff0c\u6216\u5de6\u62ec\u53f7\u7528\u5b8c\uff0c\u6216\u53f3\u62ec\u53f7\u7528\u5b8c\uff0c\u8df3\u51fa\n                return\n            backtrack(l-1, r, current+'(')  # \u4f7f\u7528\u4e00\u4e2a\u5de6\u62ec\u53f7\n            backtrack(l, r-1, current+')')  # \u4f7f\u7528\u4e00\u4e2a\u53f3\u62ec\u53f7\n        backtrack(n, n, '')\n        return result<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u62ec\u53f7\u3002\u8bbe\u8ba1\u4e00\u79cd\u7b97\u6cd5\uff0c\u6253\u5370n\u5bf9\u62ec\u53f7\u7684\u6240\u6709\u5408\u6cd5\u7684\uff08\u4f8b\u5982\uff0c\u5f00\u95ed\u4e00\u4e00\u5bf9\u5e94\uff09\u7ec4\u5408\u3002 \u8bf4\u660e\uff1a\u89e3\u96c6\u4e0d\u80fd\u5305\u542b\u91cd\u590d\u7684\u5b50\u96c6\u3002 \u4f8b\u5982&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","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\/345"}],"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=345"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/345\/revisions"}],"predecessor-version":[{"id":346,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/345\/revisions\/346"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=345"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}