{"id":734,"date":"2020-06-29T00:46:03","date_gmt":"2020-06-28T16:46:03","guid":{"rendered":"http:\/\/www.guanhaobo.cn\/?p=734"},"modified":"2020-06-29T00:46:03","modified_gmt":"2020-06-28T16:46:03","slug":"jz22-%e4%bb%8e%e4%b8%8a%e5%be%80%e4%b8%8b%e6%89%93%e5%8d%b0%e4%ba%8c%e5%8f%89%e6%a0%91","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=734","title":{"rendered":"JZ22 \u2014 \u4ece\u4e0a\u5f80\u4e0b\u6253\u5370\u4e8c\u53c9\u6811"},"content":{"rendered":"<h3>\u9898\u76ee\u63cf\u8ff0<\/h3>\n<p>\u4ece\u4e0a\u5f80\u4e0b\u6253\u5370\u51fa\u4e8c\u53c9\u6811\u7684\u6bcf\u4e2a\u8282\u70b9\uff0c\u540c\u5c42\u8282\u70b9\u4ece\u5de6\u81f3\u53f3\u6253\u5370\u3002<\/p>\n<h3>\u9898\u76ee\u5206\u6790<\/h3>\n<p>\u4e8c\u53c9\u6811\u7684\u5c42\u6b21\u904d\u5386\u3002<br \/>\n\u4f7f\u7528\u961f\u5217\u6765\u5b9e\u73b0\u5c31OK\u4e86\uff0c\u7b56\u7565\u5982\u4e0b\uff1a<br \/>\n1. \u53d6\u961f\u5934\u7ed3\u70b9<br \/>\n2. \u5c06\u5de6\u53f3\u5b50\u7ed3\u70b9\u6dfb\u52a0\u8fdb\u961f\u5217\uff08\u5148\u5224\u65ad\u5b50\u7ed3\u70b9\u662f\u5426\u4e3aNULL\uff09<br \/>\n3. \u8f93\u51fa\u5934\u7ed3\u70b9\u7684\u503c<br \/>\n4. \u5c06\u5934\u7ed3\u70b9\u5220\u9664<\/p>\n<p>\u4e00\u76f4\u5faa\u73af\u5230\u961f\u5217\u4e3a\u7a7a\u5373\u53ef\u3002<\/p>\n<h3>C++<\/h3>\n<pre><code class=\"language-cpp line-numbers\">\/*\nstruct TreeNode {\n    int val;\n    struct TreeNode *left;\n    struct TreeNode *right;\n    TreeNode(int x) :\n            val(x), left(NULL), right(NULL) {\n    }\n};*\/\nclass Solution\n{\npublic:\n    vector&lt;int&gt; PrintFromTopToBottom(TreeNode *root)\n    {\n        vector&lt;int&gt; ans;\n        if (!root)\n            return ans;\n        TreeNode *p;\n        queue&lt;TreeNode *&gt; q;\n        q.push(root);\n        while (!q.empty())\n        {\n            p = q.front();\n            q.pop();\n            if (p-&gt;left)\n                q.push(p-&gt;left);\n            if (p-&gt;right)\n                q.push(p-&gt;right);\n            ans.push_back(p-&gt;val);\n        }\n        return ans;\n    }\n};\n<\/code><\/pre>\n<h3>Java<\/h3>\n<pre><code class=\"language-java line-numbers\">import java.util.*;\n\/**\npublic class TreeNode {\n    int val = 0;\n    TreeNode left = null;\n    TreeNode right = null;\n\n    public TreeNode(int val) {\n        this.val = val;\n\n    }\n\n}\n*\/\npublic class Solution {\n    public ArrayList&lt;Integer&gt; PrintFromTopToBottom(TreeNode root) {\n        ArrayList&lt;Integer&gt; ans = new ArrayList&lt;&gt;();\n        if (root == null)\n            return ans;\n        Queue&lt;TreeNode&gt; q = new LinkedList&lt;&gt;();\n        q.add(root);\n        while (!q.isEmpty()) {\n            ans.add(q.peek().val);\n            if (q.peek().left != null)\n                q.add(q.peek().left);\n            if (q.peek().right != null)\n                q.add(q.peek().right);\n            q.poll();\n        }\n        return ans;\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u76ee\u63cf\u8ff0 \u4ece\u4e0a\u5f80\u4e0b\u6253\u5370\u51fa\u4e8c\u53c9\u6811\u7684\u6bcf\u4e2a\u8282\u70b9\uff0c\u540c\u5c42\u8282\u70b9\u4ece\u5de6\u81f3\u53f3\u6253\u5370\u3002 \u9898\u76ee\u5206\u6790 \u4e8c\u53c9\u6811\u7684\u5c42\u6b21\u904d\u5386\u3002 \u4f7f\u7528\u961f\u5217\u6765\u5b9e\u73b0 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[39],"class_list":["post-734","post","type-post","status-publish","format-standard","hentry","category-algo","tag-offer"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/734","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=734"}],"version-history":[{"count":0,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/734\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=734"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}