How to Solve Binary Tree Cameras Problem
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Binary Tree Cameras
You are given the root of a binary tree. We install cameras on the tree nodes where each camera at a node can monitor its parent, itself, and its immediate children. Return the minimum number of camer...
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Understanding the Binary Tree Cameras Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given the root of a binary tree. We install cameras on the tree nodes where each camera at a node can monitor its parent, itself, and its immediate children. Return the minimum number of cameras needed to monitor all nodes of the tree.
Binary Tree Cameras
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Get real-time assistance for Binary Tree Cameras problems during coding interviews. Interview Coder provides instant solutions and explanations.
Examples
root = [0,0,null,0,0]1One camera is enough to monitor all nodes if placed as shown.
root = [0,0,null,0,null,0,null,null,0]2At least two cameras are needed to monitor all nodes of the tree. The above image shows one of the valid configurations of camera placement.
Constraints
The number of nodes in the tree is in the range [1, 1000].Node.val == 0How Interview Coder Helps with Leetcode Problems
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