{"id":367,"date":"2020-09-26T10:32:38","date_gmt":"2020-09-26T02:32:38","guid":{"rendered":"http:\/\/39.96.58.60\/?p=367"},"modified":"2022-10-18T16:39:35","modified_gmt":"2022-10-18T08:39:35","slug":"leetcode-606-%e6%a0%b9%e6%8d%ae%e4%ba%8c%e5%8f%89%e6%a0%91%e5%88%9b%e5%bb%ba%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=367","title":{"rendered":"Leetcode 606. \u6839\u636e\u4e8c\u53c9\u6811\u521b\u5efa\u5b57\u7b26\u4e32"},"content":{"rendered":"<p>\u4f60\u9700\u8981\u91c7\u7528\u524d\u5e8f\u904d\u5386\u7684\u65b9\u5f0f\uff0c\u5c06\u4e00\u4e2a\u4e8c\u53c9\u6811\u8f6c\u6362\u6210\u4e00\u4e2a\u7531\u62ec\u53f7\u548c\u6574\u6570\u7ec4\u6210\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u7a7a\u8282\u70b9\u5219\u7528\u4e00\u5bf9\u7a7a\u62ec\u53f7 &#8220;()&#8221; \u8868\u793a\u3002\u800c\u4e14\u4f60\u9700\u8981\u7701\u7565\u6240\u6709\u4e0d\u5f71\u54cd\u5b57\u7b26\u4e32\u4e0e\u539f\u59cb\u4e8c\u53c9\u6811\u4e4b\u95f4\u7684\u4e00\u5bf9\u4e00\u6620\u5c04\u5173\u7cfb\u7684\u7a7a\u62ec\u53f7\u5bf9\u3002<\/p>\n<p><strong>\u793a\u4f8b 1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> \u4e8c\u53c9\u6811: [1,2,3,4]\n\n       1\n\n     \/   \\\n\n    2     3\n\n   \/    \n\n  4     \n\n\n\n<strong>\u8f93\u51fa:<\/strong> \"1(2(4))(3)\"\n\n\n\n<strong>\u89e3\u91ca:<\/strong> \u539f\u672c\u5c06\u662f\u201c1(2(4)())(3())\u201d\uff0c\n\n\u5728\u4f60\u7701\u7565\u6240\u6709\u4e0d\u5fc5\u8981\u7684\u7a7a\u62ec\u53f7\u5bf9\u4e4b\u540e\uff0c\n\n\u5b83\u5c06\u662f\u201c1(2(4))(3)\u201d\u3002\n\n<\/pre>\n<p><strong>\u793a\u4f8b 2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> \u4e8c\u53c9\u6811: [1,2,3,null,4]\n\n       1\n\n     \/   \\\n\n    2     3\n\n     \\  \n\n      4 \n\n\n\n<strong>\u8f93\u51fa:<\/strong> \"1(2()(4))(3)\"\n\n\n\n<strong>\u89e3\u91ca:<\/strong> \u548c\u7b2c\u4e00\u4e2a\u793a\u4f8b\u76f8\u4f3c\uff0c\n\n\u9664\u4e86\u6211\u4eec\u4e0d\u80fd\u7701\u7565\u7b2c\u4e00\u4e2a\u5bf9\u62ec\u53f7\u6765\u4e2d\u65ad\u8f93\u5165\u548c\u8f93\u51fa\u4e4b\u95f4\u7684\u4e00\u5bf9\u4e00\u6620\u5c04\u5173\u7cfb\u3002\n\n<\/pre>\n<p>**\u96be\u5ea6**: Easy<\/p>\n<p>**\u6807\u7b7e**: \u6811\u3001 \u5b57\u7b26\u4e32\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\uff1a64 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8675.57% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a15.5 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8650.00% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u4f7f\u7528\u9012\u5f52\u5904\u7406\n    \u5bf9\u4e8e\u5de6\u8282\u70b9\u6709\u4e09\u79cd\u60c5\u51b5\uff1a\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u8282\u70b9\u503c\uff1b\u82e5\u4e0d\u5b58\u5728\uff0c\u4f46\u53f3\u8282\u70b9\u5b58\u5728\uff0c\u5219\u8fd4\u56de\uff08\uff09\uff1b\u82e5\u53f3\u8282\u70b9\u4e5f\u4e0d\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u201c\u201d\n    \u5bf9\u4e8e\u53f3\u8282\u70b9\u6709\u4e24\u79cd\u60c5\u51b5\uff1a\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u8282\u70b9\u503c\uff1b\u4e0d\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u201c\u201d\n\"\"\"\n# Definition for a binary tree node.\n# class TreeNode:\n#     def __init__(self, x):\n#         self.val = x\n#         self.left = None\n#         self.right = None\n\nclass Solution:\n    def tree2str(self, t: TreeNode) -&gt; str:\n        if not t:\n            return \"\"\n        if t.right:\n            right = \"({})\".format(self.tree2str(t.right))\n        else:\n            right = \"\"\n\n        if t.left:\n            left = \"({})\".format(self.tree2str(t.left))\n        else:\n            if t.right:\n                left = \"()\"\n            else:\n                left = \"\"\n        return str(t.val)+left+ right<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u4f60\u9700\u8981\u91c7\u7528\u524d\u5e8f\u904d\u5386\u7684\u65b9\u5f0f\uff0c\u5c06\u4e00\u4e2a\u4e8c\u53c9\u6811\u8f6c\u6362\u6210\u4e00\u4e2a\u7531\u62ec\u53f7\u548c\u6574\u6570\u7ec4\u6210\u7684\u5b57\u7b26\u4e32\u3002 \u7a7a\u8282\u70b9\u5219\u7528\u4e00\u5bf9\u7a7a\u62ec\u53f7 &#038;#8220&#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\/367"}],"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=367"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/367\/revisions"}],"predecessor-version":[{"id":368,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/367\/revisions\/368"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=367"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}