{"id":309,"date":"2020-09-26T10:23:29","date_gmt":"2020-09-26T02:23:29","guid":{"rendered":"http:\/\/39.96.58.60\/?p=309"},"modified":"2022-10-18T16:43:33","modified_gmt":"2022-10-18T08:43:33","slug":"leetcode-637-%e4%ba%8c%e5%8f%89%e6%a0%91%e7%9a%84%e5%b1%82%e5%b9%b3%e5%9d%87%e5%80%bc","status":"publish","type":"post","link":"https:\/\/www.yatenglg.cn\/blog\/?p=309","title":{"rendered":"Leetcode 637. \u4e8c\u53c9\u6811\u7684\u5c42\u5e73\u5747\u503c"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u975e\u7a7a\u4e8c\u53c9\u6811, \u8fd4\u56de\u4e00\u4e2a\u7531\u6bcf\u5c42\u8282\u70b9\u5e73\u5747\u503c\u7ec4\u6210\u7684\u6570\u7ec4\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u793a\u4f8b 1\uff1a<\/strong><\/p>\n<pre><strong>\u8f93\u5165\uff1a<\/strong>\n\n    3\n\n   \/ \\\n\n  9  20\n\n    \/  \\\n\n   15   7\n\n<strong>\u8f93\u51fa\uff1a<\/strong>[3, 14.5, 11]\n\n<strong>\u89e3\u91ca\uff1a<\/strong>\n\n\u7b2c 0 \u5c42\u7684\u5e73\u5747\u503c\u662f 3 ,  \u7b2c1\u5c42\u662f 14.5 , \u7b2c2\u5c42\u662f 11 \u3002\u56e0\u6b64\u8fd4\u56de [3, 14.5, 11] \u3002\n\n<\/pre>\n<p>&nbsp;<\/p>\n<p><strong>\u63d0\u793a\uff1a<\/strong><\/p>\n<ul>\n<li>\u8282\u70b9\u503c\u7684\u8303\u56f4\u572832\u4f4d\u6709\u7b26\u53f7\u6574\u6570\u8303\u56f4\u5185\u3002<\/li>\n<\/ul>\n<p>**\u96be\u5ea6**: Easy<\/p>\n<p>**\u6807\u7b7e**: \u6811\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\uff1a48 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8694.94% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a16 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8656.04% \u7684\u7528\u6237\n\"\"\"\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 averageOfLevels(self, root: TreeNode) -&gt; List[float]:\n        result = []\n        if root == None:\n            return result\n\n        record = [root]\n        while record:\n            vals = [node.val for node in record]\n            result.append(sum(vals) \/ len(vals))\n            record_ = []\n\n            for node in record:\n                if node.left:\n                    record_.append(node.left)\n\n                if node.right:\n                    record_.append(node.right)\n            record = record_\n        return result<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u975e\u7a7a\u4e8c\u53c9\u6811, \u8fd4\u56de\u4e00\u4e2a\u7531\u6bcf\u5c42\u8282\u70b9\u5e73\u5747\u503c\u7ec4\u6210\u7684\u6570\u7ec4\u3002 &nbsp; \u793a\u4f8b 1\uff1a \u8f93\u5165\uff1a 3 \/ \\ 9 &#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":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/309"}],"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=309"}],"version-history":[{"count":1,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/309\/revisions"}],"predecessor-version":[{"id":310,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/309\/revisions\/310"}],"wp:attachment":[{"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}