How to Solve Binary Tree Pruning Problem
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Binary Tree Pruning
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.
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Understanding the Binary Tree Pruning Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
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.
Binary Tree Pruning
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Get real-time assistance for Binary Tree Pruning problems during coding interviews. PhantomCodeAI provides instant solutions and explanations.
Examples
# Example 1
root = [1,null,0,0,1]
[1,null,0,null,1]
# Example 2
root = [1,0,1,0,0,0,1]
[1,null,1,null,1]
# Example 3
root = [1,1,0,1,1,0,1,0]
[1,1,0,1,1,null,1]
Constraints
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Solve Binary Tree Pruning — Given the root of a binary tree, return the same tree where every subtree (of th...
Here's the optimal approach using Tree:
Time: O(n) | Space: O(n)
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