538. Convert BST to Greater Tree
Medium
30 Points
Tree
Depth-First Search
Binary Search Tree
Binary Tree
Given the root of a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus the sum of all keys greater than the original key in BST.
As a reminder, a binary search tree is a tree that satisfies these constraints:
Examples
Example 1
Input: root = [4,1,6,0,2,5,7,null,null,null,3,null,null,null,8]
Output: [30,36,21,36,35,26,15,null,null,null,33,null,null,null,8]
Example 2
Input: root = [0,null,1]
Output: [1,null,1]
Constraints
The number of nodes in the tree is in the range [0, 104].-104 <= Node.val <= 104All the values in the tree are unique.root is guaranteed to be a valid binary search tree.
538. Convert BST to Greater Tree
Medium
30 Points
Tree
Depth-First Search
Binary Search Tree
Binary Tree
Given the root of a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus the sum of all keys greater than the original key in BST.
As a reminder, a binary search tree is a tree that satisfies these constraints:
Examples
Example 1
Input: root = [4,1,6,0,2,5,7,null,null,null,3,null,null,null,8]
Output: [30,36,21,36,35,26,15,null,null,null,33,null,null,null,8]
Example 2
Input: root = [0,null,1]
Output: [1,null,1]
Constraints
The number of nodes in the tree is in the range [0, 104].-104 <= Node.val <= 104All the values in the tree are unique.root is guaranteed to be a valid binary search tree.