{"id":2461,"date":"2022-01-28T18:17:36","date_gmt":"2022-01-28T10:17:36","guid":{"rendered":"http:\/\/139.9.1.231\/?p=2461"},"modified":"2022-01-28T18:17:37","modified_gmt":"2022-01-28T10:17:37","slug":"leetcodeday104","status":"publish","type":"post","link":"http:\/\/139.9.1.231\/index.php\/2022\/01\/28\/leetcodeday104\/","title":{"rendered":"leetcodeday104&#8211;\u4e8c\u53c9\u6811\u7684\u6700\u5927\u6df1\u5ea6"},"content":{"rendered":"\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u4e8c\u53c9\u6811\uff0c\u627e\u51fa\u5176\u6700\u5927\u6df1\u5ea6\u3002<\/p>\n\n\n\n<p>\u4e8c\u53c9\u6811\u7684\u6df1\u5ea6\u4e3a\u6839\u8282\u70b9\u5230\u6700\u8fdc\u53f6\u5b50\u8282\u70b9\u7684\u6700\u957f\u8def\u5f84\u4e0a\u7684\u8282\u70b9\u6570\u3002<\/p>\n\n\n\n<p><strong>\u8bf4\u660e:<\/strong>&nbsp;\u53f6\u5b50\u8282\u70b9\u662f\u6307\u6ca1\u6709\u5b50\u8282\u70b9\u7684\u8282\u70b9\u3002<\/p>\n\n\n\n<p><strong>\u793a\u4f8b\uff1a<\/strong><br>\u7ed9\u5b9a\u4e8c\u53c9\u6811&nbsp;<code>[3,9,20,null,null,15,7]<\/code>\uff0c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    3\n   \/ \\\n  9  20\n    \/  \\\n   15   7<\/code><\/pre>\n\n\n\n<p>\u8fd4\u56de\u5b83\u7684\u6700\u5927\u6df1\u5ea6&nbsp;3 \u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\uff1a\u6df1\u5ea6\u4f18\u5148\u904d\u5386\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># @lc app=leetcode.cn id=104 lang=python3\r\n#\r\n# &#91;104] \u4e8c\u53c9\u6811\u7684\u6700\u5927\u6df1\u5ea6\r\n#\r\n\r\n# @lc code=start\r\n# Definition for a binary tree node.\r\n# class TreeNode:\r\n#     def __init__(self, val=0, left=None, right=None):\r\n#         self.val = val\r\n#         self.left = left\r\n#         self.right = right\r\nclass Solution:\r\n    def maxDepth(self, root: Optional&#91;TreeNode]) -> int:\r\n        def maxDepth(root):\r\n            if root==None:\r\n                return 0\r\n            if root!=None:\r\n               lf=maxDepth(root.left)\r\n               ri=maxDepth(root.right)\r\n               return max(lf,ri)+1\r\n        return maxDepth(root)\r\n\r\n\r\n# @lc code=end<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img loading=\"lazy\" width=\"847\" height=\"199\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-306.png\" alt=\"\" class=\"wp-image-2463\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-306.png 847w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-306-300x70.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-306-768x180.png 768w\" sizes=\"(max-width: 847px) 100vw, 847px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u4e8c\u53c9\u6811\uff0c\u627e\u51fa\u5176\u6700\u5927\u6df1\u5ea6\u3002 \u4e8c\u53c9\u6811\u7684\u6df1\u5ea6\u4e3a\u6839\u8282\u70b9\u5230\u6700\u8fdc\u53f6\u5b50\u8282\u70b9\u7684\u6700\u957f\u8def\u5f84\u4e0a\u7684\u8282\u70b9\u6570\u3002 \u8bf4\u660e:&nbsp; &hellip; <a href=\"http:\/\/139.9.1.231\/index.php\/2022\/01\/28\/leetcodeday104\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">leetcodeday104&#8211;\u4e8c\u53c9\u6811\u7684\u6700\u5927\u6df1\u5ea6<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[],"_links":{"self":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2461"}],"collection":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/comments?post=2461"}],"version-history":[{"count":3,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2461\/revisions"}],"predecessor-version":[{"id":2465,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2461\/revisions\/2465"}],"wp:attachment":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/media?parent=2461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/categories?post=2461"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/tags?post=2461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}