{"id":365,"date":"2020-09-26T10:32:26","date_gmt":"2020-09-26T02:32:26","guid":{"rendered":"http:\/\/39.96.58.60\/?p=365"},"modified":"2022-10-18T16:39:35","modified_gmt":"2022-10-18T08:39:35","slug":"leetcode-106-%e4%bb%8e%e4%b8%ad%e5%ba%8f%e4%b8%8e%e5%90%8e%e5%ba%8f%e9%81%8d%e5%8e%86%e5%ba%8f%e5%88%97%e6%9e%84%e9%80%a0%e4%ba%8c%e5%8f%89%e6%a0%91","status":"publish","type":"post","link":"https:\/\/www.yatenglg.cn\/blog\/?p=365","title":{"rendered":"Leetcode 106. \u4ece\u4e2d\u5e8f\u4e0e\u540e\u5e8f\u904d\u5386\u5e8f\u5217\u6784\u9020\u4e8c\u53c9\u6811"},"content":{"rendered":"<p>\u6839\u636e\u4e00\u68f5\u6811\u7684\u4e2d\u5e8f\u904d\u5386\u4e0e\u540e\u5e8f\u904d\u5386\u6784\u9020\u4e8c\u53c9\u6811\u3002<\/p>\n<p><strong>\u6ce8\u610f:<\/strong><\/p>\n<p>\u4f60\u53ef\u4ee5\u5047\u8bbe\u6811\u4e2d\u6ca1\u6709\u91cd\u590d\u7684\u5143\u7d20\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u7ed9\u51fa<\/p>\n<pre>\u4e2d\u5e8f\u904d\u5386 inorder =&nbsp;[9,3,15,20,7]\n\n\u540e\u5e8f\u904d\u5386 postorder = [9,15,7,20,3]<\/pre>\n<p>\u8fd4\u56de\u5982\u4e0b\u7684\u4e8c\u53c9\u6811\uff1a<\/p>\n<pre>    3\n\n   \/ \\\n\n  9  20\n\n    \/  \\\n\n   15   7\n\n<\/pre>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u6811\u3001 \u6df1\u5ea6\u4f18\u5148\u641c\u7d22\u3001 \u6570\u7ec4\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\uff1a192 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8656.79% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a86.4 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e865.01% \u7684\u7528\u6237\n\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 buildTree(self, inorder: List[int], postorder: List[int]) -&gt; TreeNode:\n\n        def find(inorder, postorder):\n            if inorder == []:\n                return\n            node = postorder[-1]    # \u540e\u7eed\u904d\u5386\u7684\u6700\u540e\u4e00\u4e2a\u4e3a\u5f53\u524d\u6811\u7684\u6839\n            node_index = inorder.index(node)    # \u4e2d\u5e8f\u904d\u5386\u4e2d\uff0c\u6839\u5de6\u4fa7\u4e3a\u5de6\u5b50\u6811\u8282\u70b9\uff0c\u53f3\u4fa7\u4e3a\u53f3\u5b50\u6811\u8282\u70b9\n\n            node = TreeNode(node)   # \u5f53\u524d\u8282\u70b9\n            node.left = find(inorder[:node_index], postorder[:node_index])  # \u5212\u5206\u5de6\u5b50\u6811\u4e2d\u5e8f\u53ca\u540e\u5e8f\n            node.right = find(inorder[node_index+1:], postorder[node_index:-1]) # \u5212\u5206\u53f3\u5b50\u6811\u4e2d\u5e8f\u53ca\u540e\u5e8f\n            return node\n\n        t = find(inorder, postorder)\n        return t<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u6839\u636e\u4e00\u68f5\u6811\u7684\u4e2d\u5e8f\u904d\u5386\u4e0e\u540e\u5e8f\u904d\u5386\u6784\u9020\u4e8c\u53c9\u6811\u3002 \u6ce8\u610f: \u4f60\u53ef\u4ee5\u5047\u8bbe\u6811\u4e2d\u6ca1\u6709\u91cd\u590d\u7684\u5143\u7d20\u3002 \u4f8b\u5982\uff0c\u7ed9\u51fa \u4e2d\u5e8f\u904d\u5386 in&#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\/365"}],"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=365"}],"version-history":[{"count":1,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/365\/revisions"}],"predecessor-version":[{"id":366,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/365\/revisions\/366"}],"wp:attachment":[{"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=365"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=365"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}