{"id":301,"date":"2018-12-22T23:59:50","date_gmt":"2018-12-22T15:59:50","guid":{"rendered":"http:\/\/kaispace.cn\/?p=301"},"modified":"2018-12-22T23:59:50","modified_gmt":"2018-12-22T15:59:50","slug":"n%e5%8f%89%e6%a0%91%e7%9a%84%e5%89%8d%e5%90%8e%e5%ba%8f%e8%bf%ad%e4%bb%a3%e9%81%8d%e5%8e%86","status":"publish","type":"post","link":"https:\/\/blog.kaispace.cn\/?p=301","title":{"rendered":"N\u53c9\u6811\u7684\u524d\u540e\u5e8f\u8fed\u4ee3\u904d\u5386"},"content":{"rendered":"

1\u3001\u524d\u5e8f<\/h3>\n
\/\/Definition for a Node.\nclass Node {\n    public int val;\n    public List<Node> children;\n\n    public Node() {}\n\n    public Node(int _val,List<Node>; _children) {\n        val = _val;\n        children = _children;\n    }\n};\nclass Solution {\n    public List<Integer> postorder(Node root) {\n        Stack<Node> s = new Stack<>();\n        List<Integer> result = new LinkedList<>();\n        Node x;\n        if(root!=null){\n            s.push(root);\n        }else{\n            return result;\n        }\n        while(!s.isEmpty()){\n            x = s.pop();\n            result.add(x.val);\n            for(int i = x.children.size()-1;i>-1;i++){\n                s.push(x.children.get(i));\n            }\n        }\n        return result;\n    }\n}\n<\/code><\/pre>\n
2\u3001\u540e\u5e8f<\/h3>\n
\/\/ Definition for a Node.\nclass Node {\n    public int val;\n    public List<Node> children;\n\n    public Node() {}\n\n    public Node(int _val,List<Node> _children) {\n        val = _val;\n        children = _children;\n    }\n};\nclass Solution {\n    public List<Integer> postorder(Node root) {\n        Stack<Node> s = new Stack<>();\n        List<Integer> result = new LinkedList<>();\n        Node x;\n        if(root!=null){\n            s.push(root);\n        }else{\n            return result;\n        }\n        while(!s.isEmpty()){\n            x = s.pop();\n            for(Node n:x.children){\n                s.push(n);\n            }\n            result.add(0,x.val);\n        }\n        return result;\n    }\n}\n<\/code><\/pre>\n
\u989d\u5916:\u4e8c\u53c9\u6811\u7684\u4e2d\u5e8f\u904d\u5386<\/h3>\n
class solution{\n        private List<Integer> result = new LinkedList<Integer>();\n        public List<Integer> inorderTraversal(TreeNode root) {\n        if(root == null)\n            return result;\n        Stack<TreeNode> stack = new Stack<TreeNode>();\n        do {\n        \/\/\u4f9d\u6b21\u5c06\u5de6\u8282\u70b9\u5747\u52a0\u5165\u6808\u4e2d\n            while(root != null) {\n            stack.push(root);\n            root = root.left;\n            }\n            if (!stack.isEmpty()) {\n            root = stack.pop();\n            result.add(root.val);\n            \/\/\u8fd9\u4e00\u6b65\u82e5\u53f3\u8282\u70b9\u4e3anull\u5219\u7528\u4e8e\u8eb2\u907f\u4e0a\u9762\u7684while\u5faa\u73af\n            \/\/\u82e5\u4e0d\u4e3anull\u5219\u4f1a\u5c06\u53f3\u8282\u70b9\u4e0a\u9762\u7684\u5faa\u73af\u5165\u6808\n            \/\/\u56e0\u6b64\u51fa\u6808\u987a\u5e8f\u662f\u6700\u6df1\u5904\u7684\u5de6\u4e2d\u53f3(\u53f3\u65e0\u5b50\u6811,\u82e5\u6709\u8fd8\u8981\u5ef6\u8fdf\u8be5\u5c42\u53f3\u8282\u70b9\u7684\u51fa\u6808)\n            root = root.right;\n            }\n        } while(!stack.isEmpty() || root != null);\n        return result;\n    }\n}\n<\/code><\/pre>\n
\n
\u603b\u7ed3\uff1a<\/h3>\n
  \u7531\u4e8eN\u53c9\u6811\u6ca1\u6709\u5de6\u5b50\u6811\u53f3\u5b50\u6811\u8fd9\u6837\u8bf4\u6cd5\uff0c\u6240\u4ee5\u6ca1\u7528\u4e2d\u5e8f\u904d\u5386\u65b9\u5f0f\uff0c\u8fd9\u4e09\u79cd\u65b9\u5f0f\u7528\u9012\u5f52\u8f83\u4e3a\u7b80\u5355\uff0c\u800c\u8fed\u4ee3\u7531\u4e8e\u5176\u8f93\u51fa\u7684\u4e0d\u540c\u9700\u8981\u8981\u7528\u5230\u5806\u6808\u8fd9\u4e00\u7279\u6027\uff0c\u5373FILO\uff0c\u4f46\u662f\u5728\u6811\u7684\u5c42\u6b21\u904d\u5386\u4e2d\uff0c\u7531\u4e8e\u662f\u7236\u4eb2\u8282\u70b9\u4f18\u5148\u4e8e\u5b50\u8282\u70b9\uff0c\u65e2\u9075\u5faaFIFO\uff0c\u6545\u91c7\u7528\u961f\u5217\u3002\n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"
1\u3001\u524d\u5e8f \/\/Definition for a Node. class Node { public int v…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2,3],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=\/wp\/v2\/posts\/301"}],"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=301"}],"version-history":[{"count":0,"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=\/wp\/v2\/posts\/301\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.kaispace.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}