g0801_0900.s0814_binary_tree_pruning.Solution

public class Solution extends Object

814 - Binary Tree Pruning.

Medium

Given the root of a binary tree, return the same tree where every subtree (of the given tree) not containing a 1 has been removed.

A subtree of a node node is node plus every node that is a descendant of node.

Example 1:

Input: root = [1,null,0,0,1]

Output: [1,null,0,null,1]

Explanation: Only the red nodes satisfy the property “every subtree not containing a 1”. The diagram on the right represents the answer.

Example 2:

Input: root = [1,0,1,0,0,0,1]

Output: [1,null,1,null,1]

Example 3:

Input: root = [1,1,0,1,1,0,1,0]

Output: [1,1,0,1,1,null,1]

Constraints:

Class Solution

Constructor Summary