but given a node, how to check if it is or not, we should do this: isBalanced(root) = Math.abs(height(root.left) - height(root.right)) < 1 classSolution{publicbooleanisBalanced(TreeNode root){if(root ==null)ret
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...
if(root->left==NULL&&root->right==NULL)flag=true; return; } if(root->val!=arr[num])return; if(root->left)dfs(root->left,num+1,arr); if(root->right)dfs(root->right,num+1,arr); return; } boolisValidSequence(TreeNode*root,vector<int>&arr) { len=arr.size(); flag=false; nu...
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...
Check if a binary tree is binary search tree or not (video) Delete a node from Binary Search Tree (video) Inorder Successor in a binary search tree (video) Implement: insert // insert value into tree get_node_count // get count of values stored print_values // prints the values in...
}if(root->right == NULL) { isTheEnd =true;returntrue; }returntrue; } } } }; 广度优先遍历法(推荐): boolisCompleteTree(TreeNode* root){ queue<TreeNode *> que; que.push(root);while(!que.empty()) { TreeNode * node = que.front(); ...
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...
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 ...