DFS returns an array with subtree min value, max value and sum. If the subtree is not a BST, then return null. Check both left and right subtrees returned array are not null and rootval val is within (left substree.max, right subtree. min). If current node could also be a subtree...
Can you solve this real interview question? Maximum Sum BST in Binary Tree - Given a binary tree root, return the maximum sum of all keys of any sub-tree which is also a Binary Search Tree (BST). Assume a BST is defined as follows: * The left subtree
https://leetcode.com/problems/maximum-binary-tree/discuss/106146/C%2B%2B-O(N)-solution https://leetcode.com/problems/maximum-binary-tree/discuss/106194/javac-simple-recursive-method https://leetcode.com/problems/maximum-binary-tree/discuss/106147/C%2B%2B-8-lines-O(n-log-n)-map-plus-stac...
Given an integer array with no duplicates. A maximum tree building on this array is defined as follow: The root is the maximum number in the array. The left subtree is the maximum tree constructed from left part subarray divided by the maximum number. The right subtree is the maximum tree ...
So how can we find kth maximum given the binary search tree and the k as input? The idea isreverse inorder traversal. If we do the reverse inorder traversal then we will reach to the maximum node in the BST first. So, we need to keep a counter which will increment to find the kth...
root->left->right->left=newTreeNode(10); root->right=newTreeNode(20); root->right->left=newTreeNode(18); cout<<"Minimum value in the BST is: "<<minValue(root)<<endl; cout<<"Maximum value in the BST is: "<<maxValue(root)<<endl;return0; ...
0515-find-the-largest-value-in-each-tree-row.cpp 0518-coin-change-ii.cpp 0523-continuous-subarray-sum.cpp 0535-encode-and-decode-tinyurl.cpp 0538-convert-bst-to-greater-tree.cpp 0540-single-element-in-a-sorted-array.cpp 0543-diameter-of-binary-tree.cpp 0554-brick-wall.cpp 0560-subarray-su...
0515-find-the-largest-value-in-each-tree-row.cpp 0518-coin-change-ii.cpp 0523-continuous-subarray-sum.cpp 0535-encode-and-decode-tinyurl.cpp 0538-convert-bst-to-greater-tree.cpp 0540-single-element-in-a-sorted-array.cpp 0543-diameter-of-binary-tree.cpp 0554-brick-wall.cpp 0560-subarray-su...
Binary tree is a special kind of tree where each node has a maximum of two children. The topmost node in the tree is called 'root' node. The left reference of the root node is called the 'left child' while the right reference is called the 'right child' of the ro...
http://www.programcreek.com/2013/02/leetcode-binary-tree-maximum-path-sum-java/ 另外,这道题目的BST条件,似乎没什么用。因为如果全是负数,BST也没帮助了。 ** 总结: pre-order -> top-down post-order -> bottom-up in-order -> ? level-order -> bfs ...