{"id":383,"date":"2019-01-02T13:17:37","date_gmt":"2019-01-02T05:17:37","guid":{"rendered":"https:\/\/kaispace.cn\/?p=383"},"modified":"2019-01-02T13:17:37","modified_gmt":"2019-01-02T05:17:37","slug":"%e6%a0%91%e7%9a%84%e4%ba%8c%e4%b8%89%e4%ba%8b%e4%b8%80","status":"publish","type":"post","link":"https:\/\/blog.kaispace.cn\/?p=383","title":{"rendered":"\u6811\u7684\u4e8c\u4e09\u4e8b(\u4e00)"},"content":{"rendered":"<h1>\u6811\u7684\u4e8c\u4e09\u4e8b(\u4e00)<\/h1>\n<h2>\u4e00\u3001\u6811\u7684\u7ed3\u6784<\/h2>\n<p>\u9996\u5148\u6811\u662f\u5efa\u7acb\u4e8e\u7269\u7406\u7ed3\u6784\u4e0a\u7684\u903b\u8f91\u7ed3\u6784\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u662f\u5e95\u5c42\u5b9e\u73b0\u662f\u5141\u8bb8\u7528List\u6216\u8005Vector\u6765\u5b8c\u6210\u3002\u6811\u6700\u91cd\u8981\u53ef\u4ee5\u5206\u4e3a\u4e09\u90e8\u5206:<\/p>\n<ul>\n<li>\u6839<\/li>\n<li>\u7236\u8282\u70b9<\/li>\n<li>\u5b50\u8282\u70b9<\/li>\n<\/ul>\n<p>\u800c\u6811\u4ece\u6bcf\u4e2a\u8282\u70b9\u7684<strong>\u6700\u5927\u5206\u652f\u6570N<\/strong>\u53ef\u4ee5\u5206\u4e3a<strong>N\u53c9\u6811<\/strong>\uff0c\u6700\u5e38\u7528\u7684\u662f<strong>\u4e8c\u53c9\u6811<\/strong>\uff0c\u5373\u6bcf\u4e2a\u8282\u70b9\u81f3\u591a\u6709\u4e24\u4e2a\u5206\u652f\u3002<\/p>\n<p>\u8fd9\u91cc\u7ed9\u51fa\u4e00\u4e2a\u4e8c\u53c9\u6811\u8282\u70b9\u7684\u5b9a\u4e49\u66f4\u65b9\u4fbf\u4e86\u89e3\u5176\u4e2d\u5173\u7cfb<\/p>\n<pre><code class=\"language-java line-numbers\">class TreeNode{\n    int val;\n    TreeNode leftChild;\n    TreeNode rightChild;\n}\n<\/code><\/pre>\n<p>\u8fd9\u662f\u6700\u666e\u901a\u7684\u6811\u8282\u70b9\u5b9a\u4e49\u65b9\u6cd5\u3002\u5728\u6811\u7684\u8868\u793a\u6cd5\u4e2d\uff0c\u6709<\/p>\n<ul>\n<li>\u53cc\u4eb2\u8868\u793a\u6cd5<\/li>\n<li>\u5b69\u5b50\u8868\u793a\u6cd5<\/li>\n<li>\u5b69\u5b50\u5144\u5f1f\u8868\u793a\u6cd5<\/li>\n<\/ul>\n<p>\u662f\u5206\u522b\u4e3a\u4e0d\u540c\u5e95\u5c42\u7269\u7406\u7ed3\u6784\u4ee5\u53ca\u5e94\u7528\u573a\u666f\u6240\u8bbe\u8ba1\u7684\u3002<\/p>\n<h3>1\u3001\u53cc\u4eb2\u8868\u793a\u6cd5<\/h3>\n<p>\u53cc\u4eb2\u8868\u793a\u6cd5\u5982\u4e0b<\/p>\n<pre><code class=\"language-java line-numbers\">class TreeNode{\n    int val;\n    int parentPos;\n}\n<\/code><\/pre>\n<p>\u4e4b\u6240\u4ee5\u5b9a\u4f4d\u7236\u8282\u70b9\u53ea\u7528\u4e86\u4e00\u4e2a\u79e9Rank\u53bb\u8868\u793a\uff0c\u7528\u5f80\u5f80\u8fd9\u7c7b\u6811\u7684\u5e95\u5c42\u7ed3\u6784\u662f\u5206\u5e03\u7d27\u5bc6\u7684Vector\u6570\u7ec4\u7ed3\u6784\uff0c\u662f\u5bfb\u79e9\u8bbf\u95ee\u7684\u3002<\/p>\n<p>\u904d\u5386\u8be5\u7c7b\u6811\u65f6\u80fd\u591f\u5f88\u7b80\u5355\u7684\u4ece\u67d0\u4e00\u7ed3\u70b9\u5f00\u59cb\u5faa\u7740\u7236\u8282\u70b9\u5f80\u4e0a\u76f4\u81f3\u6839\u8282\u70b9\u3002<\/p>\n<h3>2\u3001\u5b69\u5b50\u8868\u793a\u6cd5<\/h3>\n<p>\u56e0\u4e3a\u8fd9\u7c7b\u8868\u793a\u6cd5\u662f\u9002\u7528\u4e8e\u591a\u53c9\u6811\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5b69\u5b50\u8282\u70b9\u7684\u4e2a\u6570\u5f80\u5f80\u662f\u4e0d\u53ef\u77e5\u7684\uff0c\u56e0\u6b64\u91c7\u7528\u5b69\u5b50\u7f57\u5217\u7684\u65b9\u5f0f\u5c31\u4e0d\u5408\u7406\u7684\uff0c\u56e0\u6b64\u53ef\u4ee5\u91c7\u7528<\/p>\n<pre><code class=\"language-java line-numbers\">class TreeNode{\n    int val;\n    List&lt;TreeNode&gt; child;\n}\n<\/code><\/pre>\n<p>\u4f7f\u7528\u4e00\u4e2a\u53ef\u53d8\u957f\u5ea6\u7684\u94fe\u8868\u5b58\u50a8\u5b69\u5b50\uff0c\u904d\u5386\u8be5\u94fe\u8868\u5373\u53ef\u8bbf\u95ee\u6240\u6709\u5b69\u5b50\u8282\u70b9\u3002<\/p>\n<h3>3\u3001\u5b69\u5b50\u5144\u5f1f\u8868\u793a\u6cd5<\/h3>\n<p>\u8fd9\u7c7b\u65b9\u6cd5\u53ef\u4ee5\u5c06\u591a\u53c9\u6811\u9690\u5f0f\u5730\u8f6c\u6210\u4e8c\u53c9\u6811\u7684\u7ed3\u6784\uff0c\u5b9a\u4e49\u5982\u4e0b<\/p>\n<pre><code class=\"language-java line-numbers\">class TreeNode{\n    int val;\n    TreeNode firstchild,nextsibling;\n}\n<\/code><\/pre>\n<p>\u5176\u5b9a\u4e49\u4e86\u67d0\u4e2a\u8282\u70b9\u7684\u9996\u4e2a\u5b69\u5b50\u8282\u70b9\u4ee5\u53ca\u5f53\u524d\u8282\u70b9\u7684\u4e0b\u4e00\u5144\u5f1f\u8282\u70b9\uff0c\u867d\u7136\u4ece\u8282\u70b9\u7684\u5173\u7cfb\u4e0a\u4e24\u4e2a\u65b9\u5411\u5e76\u4e0d\u5e73\u7ea7\uff0c\u4f46\u7531\u4e8e\u662f\u4e24\u4e2a\u51fa\u53e3\uff0c\u56e0\u6b64\u4e5f\u53ef\u4ee5\u8ba4\u4e3a\u662f\u4e8c\u53c9\u6811\u7684\u4e24\u4e2a\u5b50\u8282\u70b9\u3002<\/p>\n<h2>\u4e8c\u3001\u6811\u7684\u904d\u5386\u65b9\u6cd5<\/h2>\n<p>\u591a\u53c9\u6811\u7684\u904d\u5386\u65b9\u5f0f:<br \/>\n1. \u524d\u5e8f\u904d\u5386 <strong>VC<\/strong><br \/>\n2. \u540e\u5e8f\u904d\u5386 <strong>CV<\/strong><\/p>\n<p>\u4e8c\u53c9\u6811\u7684\u904d\u5386\u65b9\u5f0f:<br \/>\n1. \u524d\u5e8f\u904d\u5386 <strong>VLR<\/strong><br \/>\n2. \u4e2d\u5e8f\u904d\u5386 <strong>LVR<\/strong><br \/>\n3. \u540e\u5e8f\u904d\u5386 <strong>LRV<\/strong><\/p>\n<p>V\uff1a\u6839\u8282\u70b9 C\uff1a\u5b50\u8282\u70b9 L\uff1a\u5de6\u5b69\u5b50 R\uff1a\u53f3\u5b69\u5b50<\/p>\n<p>\u9996\u5148\u6811\u7684\u904d\u5386\u7528\u9012\u5f52\u662f\u975e\u5e38\u7b80\u5355\u7684\uff0c\u5982\u5148\u5e8f\u904d\u5386N\u53c9\u6811<\/p>\n<pre><code class=\"language-java line-numbers\">List&lt;Integer&gt; result = new ArrayList&lt;&gt;();\nclass TreeNode{\n    int val;\n    List&lt;TreeNode&gt; child;\n}\npublic void preorder(TreeNode n){\n    if(n==null){\n        return;\n    }\n    result.add(n.val);\n    for(TreeNode c:n.child){\n        preorder(c);\n    }\n}\npublic void postorder(TreeNode n){\n    if(n==null){\n        return;\n    }\n    for(TreeNode c:n.child){\n        preorder(c);\n    }\n    result.add(n.val);\n}\n<\/code><\/pre>\n<p>\u5176\u533a\u522b\u4ec5\u4ec5\u53ea\u662f\u8bfb\u53d6\u5176\u6570\u636e\u57df\u7684\u90a3\u4e00\u6b65\u7684\u4f4d\u7f6e\uff08\u4e8c\u53c9\u6811\u540c\u7406\uff09\u3002<br \/>\n\u5176\u91cd\u70b9\u5728\u4e8e\u5982\u4f55\u91c7\u7528\u8fed\u4ee3\u5b9e\u73b0\uff0c\u7531\u4e8e\u5176\u904d\u5386\u987a\u5e8f\u53ef\u80fd\u4f1a\u4e0e\u8bfb\u53d6\u987a\u5e8f\u4e0d\u540c\uff0c\u5373FILOM\uff0c\u56e0\u6b64\u4fbf\u8981\u5f15\u5165\u4e00\u4e2a\u80fd\u8fbe\u5230\u8fd9\u79cd\u6548\u679c\uff0c\u4e5f\u5c31\u662f<strong>\u6808<\/strong>\u3002<br \/>\n\u8fd9\u91cc\u53ef\u4ee5\u53c2\u8003\u6211\u524d\u9762\u4e00\u7bc7\u6587\u7ae0 <a href=\"https:\/\/kaispace.cn\/?p=301\">N\u53c9\u6811\u7684\u524d\u540e\u5e8f\u8fed\u4ee3\u904d\u5386<\/a><\/p>\n<p>\u5173\u4e8e\u6811\u7684\u904d\u5386\u65b9\u5f0f\u8fd8\u6709\u4e00\u79cd\u662f\u5c42\u6b21\u904d\u5386\uff0c\u5373\u904d\u5386\u662f\u7531\u6bcf\u4e2a\u5c42\u6b21\u7531\u5de6\u5230\u53f3\u7684\uff0c\u8fd9\u91cc\u5199\u51fa\u9012\u5f52\u53ca\u8fed\u4ee3\u7684\u4e24\u4e2a\u4ee3\u7801<\/p>\n<pre><code class=\"language-java line-numbers\">List&lt;ArrayList&lt;Integer&gt;&gt; result = new ArrayList&lt;&gt;();\nclass TreeNode{\n    int val;\n    List&lt;TreeNode&gt; child;\n}\n\/\/\u601d\u8def\u4f9d\u7136\u662fDFS\uff0c\u904d\u5386\u8fc7\u7a0b\u643a\u5e26\u4e00\u4e2a\u5f53\u524d\u5c42\u7ea7\u5c5e\u6027\n\/\/\u91c7\u7528\u4e00\u4e2a\u4e8c\u7ef4\u7ed3\u6784\u5b58\u904d\u5386\u7684\u6570\u636e\n\/\/\u904d\u5386\u5b8c\u6210\u53ea\u8981\u518d\u904d\u5386\u8fd9\u4e2a\u4e8c\u7ef4\u7ed3\u6784\u5c31\u5b8c\u6210\u4e86\npublic void levelTraversalRecursion(TreeNode n,int level){\n    List&lt;Integer&gt; curLevel = null;\n    if(level&gt;result.size()){\n        curLevel = result.add(new ArrayList&lt;Integer&gt;());\n    }else{\n        curLevel = result.get(level-1);\n    }\n    curLevel.add(n.val);\n    for(TreeNode c:n.child){\n        levelTraversalRecursion(c,level+1);\n    }\n}\n\/\/\u56e0\u4e3a\u9075\u5b88\u4e86FIFO\uff0c\u8fed\u4ee3\u53cd\u800c\u66f4\u9002\u5408\u5c42\u6b21\u904d\u5386\n\/\/\u5f15\u5165\u4e00\u4e2a\u961f\u5217\u5373\u53ef\u5b8c\u7f8e\u5730\u5b9e\u73b0\u5c42\u6b21\u904d\u5386\nList&lt;Integer&gt; result = new ArrayList&lt;&gt;();\nQueue&lt;TreeNode&gt; store = new Queue&lt;&gt;();\npublic void levelTraversal(TreeNode root){\n    store.add(root)\n    while(!store.isEmpty())\n    {\n        TreeNode temp = store.poll();\n        result.add(temp.val);\n        for(TreeNode c:temp.cild){\n            store.add(c);\n        }\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6811\u7684\u4e8c\u4e09\u4e8b(\u4e00) \u4e00\u3001\u6811\u7684\u7ed3\u6784 \u9996\u5148\u6811\u662f\u5efa\u7acb\u4e8e\u7269\u7406\u7ed3\u6784\u4e0a\u7684\u903b\u8f91\u7ed3\u6784\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u662f\u5e95\u5c42\u5b9e\u73b0\u662f\u5141\u8bb8\u7528List\u6216\u8005V&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=\/wp\/v2\/posts\/383"}],"collection":[{"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=383"}],"version-history":[{"count":0,"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=\/wp\/v2\/posts\/383\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=383"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=383"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}