Given the root
of a binary tree, consider all root to leaf paths:
paths from the root to any leaf. (A leaf is a node with no children.)
A node
is insufficient if every such root to leaf
path intersecting this node
has sum strictly less than limit
.
Delete all insufficient nodes simultaneously, and return the root of the resulting binary tree.
Example 1:
Input: root = [1,2,3,4,-99,-99,7,8,9,-99,-99,12,13,-99,14], limit = 1 Output: [1,2,3,4,null,null,7,8,9,null,14]
Example 2:
Input: root = [5,4,8,11,null,17,4,7,1,null,null,5,3], limit = 22 Output: [5,4,8,11,null,17,4,7,null,null,null,5]
Example 3:
Input: root = [1,2,-3,-5,null,4,null], limit = -1 Output: [1,null,-3,4]