Given inorder and postorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. 遞歸構造 ...
原題地址:http: oj.leetcode.com problems construct binary tree from inorder and postorder traversal 題意:根據二叉樹的中序遍歷和后序遍歷恢復二叉樹。 解題思路:看到樹首先想到要用遞歸來解題。以這道題為例:如果一顆二叉樹為 , , , , , , ,則中序遍歷為 , , , , , , ,后序遍歷為 , , , ...
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Given inorder and postorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. 遞歸構造 ...
Given inorder and postorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree ...
從前序中序遍歷來重構二叉樹 經典題,從期末考試到考研什么的應該都有 前序遍歷第一個肯定是root 在inorder里面去找root 左邊的是leftsubtree , 右邊的是rightsubtree 然后preorder除去order,后面lifetsubtree.size ...
Given preorder and inorder traversal of a tree, construct the binary tree. You may assume that duplicates do not exist ...
題目: Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 題解 ...
原題地址:http://oj.leetcode.com/problems/binary-tree-inorder-traversal/ 題意:二叉樹的中序遍歷。這道題用遞歸比較簡單,考察的是非遞歸實現二叉樹中序遍歷。中序遍歷順序為:左子樹,根,右子樹。如此遞歸下去。 解題思路:假設樹為: 1 / \ ...
原題地址:http://oj.leetcode.com/problems/binary-tree-postorder-traversal/ 題意:實現后序遍歷。遞歸實現比較簡單,非遞歸實現。 解題思路:這道題的迭代求解比先序遍歷和后序遍歷要麻煩一些。假設一棵樹是這樣的: 1 / \ ...
Given a binary tree, return the postorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3 ...