{"id":373,"date":"2020-09-26T10:33:15","date_gmt":"2020-09-26T02:33:15","guid":{"rendered":"http:\/\/39.96.58.60\/?p=373"},"modified":"2022-10-18T16:39:35","modified_gmt":"2022-10-18T08:39:35","slug":"leetcode-538-%e6%8a%8a%e4%ba%8c%e5%8f%89%e6%90%9c%e7%b4%a2%e6%a0%91%e8%bd%ac%e6%8d%a2%e4%b8%ba%e7%b4%af%e5%8a%a0%e6%a0%91","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=373","title":{"rendered":"Leetcode 538. \u628a\u4e8c\u53c9\u641c\u7d22\u6811\u8f6c\u6362\u4e3a\u7d2f\u52a0\u6811"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u4e8c\u53c9\u641c\u7d22\u6811\uff08Binary Search Tree\uff09\uff0c\u628a\u5b83\u8f6c\u6362\u6210\u4e3a\u7d2f\u52a0\u6811\uff08Greater Tree)\uff0c\u4f7f\u5f97\u6bcf\u4e2a\u8282\u70b9\u7684\u503c\u662f\u539f\u6765\u7684\u8282\u70b9\u503c\u52a0\u4e0a\u6240\u6709\u5927\u4e8e\u5b83\u7684\u8282\u70b9\u503c\u4e4b\u548c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u4f8b\u5982\uff1a<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> \u539f\u59cb\u4e8c\u53c9\u641c\u7d22\u6811:\n\n              5\n\n            \/   \\\n\n           2     13\n\n\n\n<strong>\u8f93\u51fa:<\/strong> \u8f6c\u6362\u4e3a\u7d2f\u52a0\u6811:\n\n             18\n\n            \/   \\\n\n          20     13\n\n<\/pre>\n<p>&nbsp;<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong>\u672c\u9898\u548c 1038:&nbsp;<a href=\"https:\/\/leetcode-cn.com\/problems\/binary-search-tree-to-greater-sum-tree\/\">https:\/\/leetcode-cn.com\/problems\/binary-search-tree-to-greater-sum-tree\/<\/a> \u76f8\u540c<\/p>\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\uff1a68 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8698.56% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a15.6 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8618.48% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u5148\u5904\u7406\u53f3\u5b50\u6811\uff0c\u7136\u540e\u5f53\u524d\u8282\u70b9\uff0c\u7136\u540e\u5904\u7406\u5de6\u5b50\u6811\n    \u4f7f\u7528\u4e00\u4e2a\u503c\uff0c\u4fdd\u5b58\u5927\u4e8e\u5f53\u524d\u8282\u70b9\u7684\u8282\u70b9\u503c\u7684\u603b\u548c\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 convertBST(self, root: TreeNode) -&gt; TreeNode:\n        self.record = 0     # \u7528\u4e8e\u8bb0\u5f55\u5927\u4e8e\u5f53\u524d\u8282\u70b9\u7684\u8282\u70b9\u548c\n        def find(root):\n            if root.right:  # \u5982\u679c\u5b58\u5728\u53f3\u5b50\u6811\n                find(root.right)    # \u5219\u7ee7\u7eed\u5904\u7406\u53f3\u5b50\u6811\n            self.record += root.val # \u5904\u7406\u5b8c\u53f3\u5b50\u6811\u540e\uff0c\u5c06\u5f53\u524d\u8282\u70b9\u503c\u6dfb\u52a0\u5230\u8282\u70b9\u548c\u4e2d\n            root.val = self.record  # \u5c06\u5f53\u524d\u8282\u70b9\u503c\u6539\u4e3a\u8282\u70b9\u548c\n            if root.left:           # \u5904\u7406\u5de6\u5b50\u6811\n                find(root.left)\n        if root:\n            find(root)\n        return root<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u4e8c\u53c9\u641c\u7d22\u6811\uff08Binary Search Tree\uff09\uff0c\u628a\u5b83\u8f6c\u6362\u6210\u4e3a\u7d2f\u52a0\u6811\uff08Greater Tree)\uff0c\u4f7f&#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\/373"}],"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=373"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/373\/revisions"}],"predecessor-version":[{"id":374,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/373\/revisions\/374"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=373"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}