原题链接在这里:https://leetcode.com/problems/maximum-sum-bst-in-binary-tree/description/ 题目: Given a binary treeroot, returnthe maximum sum of all keys of any sub-tree which is also a Binary Search Tree (BST). Assume
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
21classSolution{public:intmaxPathSum(TreeNode* root){intres = INT_MIN;maxDown(root, res);returnres; }intmaxDown(TreeNode* node,int& res){if(!node) {return0; }intleft =max(0,maxDown(node->left, res));// prune negative branchintright =max(0,maxDown(node->right, res)); res =m...
Given therootof a binary tree, split the binary tree into two subtrees by removing one edge such that the product of the sums of the subtrees is maximized. Returnthe maximum product of the sums of the two subtrees. Since the answer may be too large, return it modulo109 + 7. Note t...
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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 ...
Given the below binary tree, 1 / \ 2 3 Return6. 链接:https://leetcode.com/problems/binary-tree-maximum-path-sum/#/description 5/10/2017 算法班 4ms, 8% 感觉能够独立解决hard题了,虽然解得很💩,但是内心还是有些小激动! 思路: 后序遍历。这是能做出来这道题我想到的。
https://github.com/grandyang/leetcode/issues/654 类似题目: Maximum Binary Tree II 参考资料: https://leetcode.com/problems/maximum-binary-tree/ https://leetcode.com/problems/maximum-binary-tree/discuss/106146/C%2B%2B-O(N)-solution https://leetcode.com/problems/maximum-binary-tree/discuss/106...
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