{"id":2456,"date":"2022-01-28T17:25:00","date_gmt":"2022-01-28T09:25:00","guid":{"rendered":"http:\/\/139.9.1.231\/?p=2456"},"modified":"2022-01-28T17:25:02","modified_gmt":"2022-01-28T09:25:02","slug":"leetcodeday101","status":"publish","type":"post","link":"http:\/\/139.9.1.231\/index.php\/2022\/01\/28\/leetcodeday101\/","title":{"rendered":"leetcodeday101 &#8211;\u5bf9\u79f0\u4e8c\u53c9\u6811"},"content":{"rendered":"\n<p>\u7ed9\u4f60\u4e00\u4e2a\u4e8c\u53c9\u6811\u7684\u6839\u8282\u70b9&nbsp;<code>root<\/code>&nbsp;\uff0c \u68c0\u67e5\u5b83\u662f\u5426\u8f74\u5bf9\u79f0\u3002<\/p>\n\n\n\n<p><strong>\u793a\u4f8b 1\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image is-style-default\"><img src=\"https:\/\/assets.leetcode.com\/uploads\/2021\/02\/19\/symtree1.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code><strong>\u8f93\u5165\uff1a<\/strong>root = &#91;1,2,2,3,4,4,3]\n<strong>\u8f93\u51fa\uff1a<\/strong>true<\/code><\/pre>\n\n\n\n<p><strong>\u793a\u4f8b 2\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image is-style-default\"><img src=\"https:\/\/assets.leetcode.com\/uploads\/2021\/02\/19\/symtree2.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code><strong>\u8f93\u5165\uff1a<\/strong>root = &#91;1,2,2,null,3,null,3]\n<strong>\u8f93\u51fa\uff1a<\/strong>false\n\n\u4ee3\u7801\uff1a<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># &#91;101] \u5bf9\u79f0\u4e8c\u53c9\u6811\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 isSymmetric(self, root: TreeNode) -> bool:\r\n        def isEqual(l,r):\r\n            if l==None and r==None:\r\n                return\r\n            if l==None and r!=None:\r\n                return False\r\n            if l!=None and r==None:\r\n                return False\r\n            if l.val==r.val:\r\n                if isEqual(l.left,r.right)==False or isEqual(l.right,r.left)==False:\r\n                    return False\r\n            else:\r\n                return False\r\n        return True if isEqual(root.left,root.right)==None else False\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=\"897\" height=\"237\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-305.png\" alt=\"\" class=\"wp-image-2458\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-305.png 897w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-305-300x79.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-305-768x203.png 768w\" sizes=\"(max-width: 897px) 100vw, 897px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u4f60\u4e00\u4e2a\u4e8c\u53c9\u6811\u7684\u6839\u8282\u70b9&nbsp;root&nbsp;\uff0c \u68c0\u67e5\u5b83\u662f\u5426\u8f74\u5bf9\u79f0\u3002 \u793a\u4f8b 1\uff1a \u793a\u4f8b 2\uff1a<\/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\/2456"}],"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=2456"}],"version-history":[{"count":3,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2456\/revisions"}],"predecessor-version":[{"id":2460,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2456\/revisions\/2460"}],"wp:attachment":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/media?parent=2456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/categories?post=2456"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/tags?post=2456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}