http://www.geeksforgeeks.org/morris-traversal-for-preorder/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> #include <map> us…

http://www.geeksforgeeks.org/boundary-traversal-of-binary-tree/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> #include <map>…

http://www.geeksforgeeks.org/iterative-postorder-traversal-using-stack/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> #include &l…

http://www.geeksforgeeks.org/full-and-complete-binary-tree-from-given-preorder-and-postorder-traversals/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #in…

http://www.geeksforgeeks.org/construct-tree-from-given-inorder-and-preorder-traversal/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream&…

http://www.geeksforgeeks.org/inorder-tree-traversal-without-recursion-and-without-stack/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstrea…

http://www.geeksforgeeks.org/inorder-tree-traversal-without-recursion/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> using namespace std; struct node { int data; struct node *lef…

http://www.geeksforgeeks.org/level-order-traversal-in-spiral-form/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> using namespace std; struct node { int data; struct node *left, *…

http://www.geeksforgeeks.org/lowest-common-ancestor-binary-tree-set-1/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> #include <…

http://www.geeksforgeeks.org/print-ancestors-of-a-given-binary-tree-node-without-recursion/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fst…

http://www.geeksforgeeks.org/in-place-convert-a-given-binary-tree-to-doubly-linked-list/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstrea…

http://www.geeksforgeeks.org/largest-independent-set-problem/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> #include <map>…

http://www.geeksforgeeks.org/convert-a-given-tree-to-sum-tree/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> using namespace std;…

http://www.geeksforgeeks.org/populate-inorder-successor-for-all-nodes/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> using namesp…

http://www.geeksforgeeks.org/connect-nodes-at-same-level-with-o1-extra-space/ recursive: #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstrea…

http://www.geeksforgeeks.org/check-if-a-given-binary-tree-is-sumtree/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> #include <string> #include <fstream> using namespa…

http://www.geeksforgeeks.org/how-to-determine-if-a-binary-tree-is-balanced/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> using namespace std; struct node { int data; struct node…

http://www.geeksforgeeks.org/diameter-of-a-binary-tree/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> using namespace std; struct node { int data; struct node *left, *right; node…

http://www.geeksforgeeks.org/convert-an-arbitrary-binary-tree-to-a-tree-that-holds-children-sum-property/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> using namespace std; struc…

http://www.geeksforgeeks.org/check-for-children-sum-property-in-a-binary-tree/ #include <iostream> #include <vector> #include <algorithm> #include <queue> #include <stack> using namespace std; struct node { int data; struct n…

Binary Tree Preorder Traversal Given a binary tree, return the preorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [1,2,3]. c++版: /** * Definition for binary tree * struct TreeNode { * int val; * TreeNod…

详见:剑指 Offer 题目汇总索引:第6题 Binary Tree Postorder Traversal            Given a binary tree, return the postorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [3,2,1]. Note: Recursive solution is trivial, could…

144. Binary Tree Preorder Traversal 前序的非递归遍历:用堆来实现 如果把这个代码改成先向堆存储左节点再存储右节点,就变成了每一行从右向左打印 如果用队列替代堆,并且先存储左节点,再存储右节点,就变成了逐行打印 class Solution { public: vector<int> preorderTraversal(TreeNode* root) { vector<int> result; if(root == NULL) return res…

/* * 105. Construct Binary Tree from Inorder and preorder Traversal * 11.20 By Mingyang * 千万不要以为root一定在中间那个点,还是要找一下中间点的位置 * p.left = construct(preorder, preStart + 1, preStart + (k - inStart),inorder, inStart, k - 1); * p.right = construct(preorder,…

Given a binary tree, return the inorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [1,3,2]. Note: Recursive solution is trivial, could you do it iteratively? confused what "{1,#,2,3}" means? > re…

题目大意 https://leetcode.com/problems/binary-tree-inorder-traversal/description/ 94. Binary Tree Inorder Traversal Given a binary tree, return the inorder traversal of its nodes' values. Example: Input: [1,null,2,3] 1 \ 2 / 3 Output: [1,3,2] Follow up:…

Given a binary tree, return the postorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [3,2,1]. Note: Recursive solution is trivial, could you do it iteratively? 经典题目,求二叉树的后序遍历的非递归方法,跟前序,中序,层序一样都需要用到栈,后续的…

Binary Tree Zigzag Level Order Traversal Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tree {3,9,20,…

原题: Binary Tree Inorder Traversal 和 3月3日(2) Binary Tree Preorder Traversal 类似,只不过变成中序遍历,把前序遍历的代码拿出来,改函数,改一句话位置 AC.…

Total Accepted: 98729 Total Submissions: 261539 Difficulty: Medium Given a binary tree, return the inorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [1,3,2]. Note: Recursive solution is trivial, could y…