https://github.com/grandyang/leetcode/issues/958 参考资料: https://leetcode.com/problems/check-completeness-of-a-binary-tree/ https://leetcode.com/problems/check-completeness-of-a-binary-tree/discuss/205682/JavaC%2B%2BPython-BFS-Level-Order-Traversal https://leetcode.com/problems/check-complet...
int GetDepth(TreeNode *root) {if(root == NULL)return0;returnmax(GetDepth(root->left), GetDepth(root->right)) +1; } bool GetAns(TreeNode *root, int dep) {//只有根节点的情况,不用判空,因为不会递归到那if(dep == depth) {returntrue; }if(dep < depth -1) {if(root->left == ...
力扣leetcode-cn.com/problems/check-completeness-of-a-binary-tree/ 题目要求: 思路:1.利用二叉树节点编号与非空节点的关系来做 思路2:根据完全二叉树的节点分布特点来做。规则在图中 code如下: python class TreeNode: def __init__(self, val=0, left=None, right=None): self.val = val self....
Given a binary tree, determine if it is acomplete binary tree. Definition of a complete binary tree fromWikipedia: In a complete binary tree every level, except possibly the last, is completely filled, and all nodes in the last level are as far left as possible. It can have between 1 a...
1classSolution2{3public:4boolisCompleteTree(TreeNode*root)5{6if(root ==NULL)7returnfalse;89queue<TreeNode *>q;10q.push(root);11boolmustHaveNoChild =false;12boolresult =true;13while(!q.empty())14{15TreeNode* pNode =q.front();16q.pop();17if(mustHaveNoChild)//如果一个节点没有子...
Definition of a complete binary tree fromWikipedia: In a complete binary tree every level, except possibly the last, is completely filled, and all nodes in the last level are as far left as possible. It can have between 1 and 2h nodes inclusive at the last level h. ...
Check Completeness of a Binary Tree Code link:https://leetcode.com/problems/check-completeness-of-a-binary-tree/ Constraint: In a complete binary tree, every level, except possibly the last, is completely filled, and all nodes in the last level are as far left as possible. It can have ...
958. Check Completeness of a Binary Tree//https://leetcode.com/problems/check-completeness-of-a-binary-tree/description/classTreeNode(var `val`: Int) { var left: TreeNode? =nullvar right: TreeNode? =null}classSolution { fun isCompleteTree(root: TreeNode?): Boolean {if(root ==null) ...
From: https://leetcode.com/problems/check-completeness-of-a-binary-tree/discuss/205682/JavaC%2B%2BPython-BFS-Solution-and-DFS-Soluiton Use BFS to do a level order traversal, add childrens to the bfs queue, until we met the first empty node. ...
* Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */classSolution{public:boolisCompleteTree(TreeNode* root){if(root ==NULL) ...