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How to Solve Count Nodes With the Highest Score Problem
Master the Count Nodes With the Highest Score LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#2049
LeetCode ProblemCount Nodes With the Highest Score
There is a binary tree rooted at 0 consisting of n nodes. The nodes are labeled from 0 to n - 1. You are given a 0-indexed integer array parents representing the tree, where parents[i] is the parent of node i. Since node 0 is the root, parents[0] == -1. Each node has a score. To find the score of a node, consider if the node and the edges connected to it were removed. The tree would become one or more non-empty subtrees. The size of a subtree is the number of the nodes in it. The score of the node is the product of the sizes of all those subtrees. Return the number of nodes that have the highest score.
ArrayTreeDepth-First SearchBinary Tree
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Problem Breakdown
Understanding the Count Nodes With the Highest Score Problem
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Problem Statement
There is a binary tree rooted at 0 consisting of n nodes. The nodes are labeled from 0 to n - 1. You are given a 0-indexed integer array parents representing the tree, where parents[i] is the parent of node i. Since node 0 is the root, parents[0] == -1. Each node has a score. To find the score of a node, consider if the node and the edges connected to it were removed. The tree would become one or more non-empty subtrees. The size of a subtree is the number of the nodes in it. The score of the node is the product of the sizes of all those subtrees. Return the number of nodes that have the highest score.
MediumProblem #2049
LeetCodeCount Nodes With the Highest Score
Related Topics
ArrayTreeDepth-First SearchBinary Tree
How Phantom Code Helps
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Examples
# Example 1
Input
parents = [-1,2,0,2,0]
Output
3
# Example 2
Input
parents = [-1,2,0]
Output
2
Constraints
n == parents.length
2 <= n <= 105
parents[0] == -1
0 <= parents[i] <= n - 1 for i != 0
parents represents a valid binary tree.
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Solve Count Nodes With the Highest Score — There is a binary tree rooted at 0 consisting of n nodes. The nodes are labeled ...
Here's the optimal approach using Array:
def solve(input):
# Optimal O(n) solution
return result
Time: O(n) | Space: O(n)
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Frequently Asked Questions
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Phantom Code generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.
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What coding mistakes does Phantom Code help me avoid during Count Nodes With the Highest Score interviews?
Phantom Code catches common mistakes like off-by-one errors, missing edge cases, incorrect base conditions, and suboptimal approaches. It provides clean, well-structured code that handles all edge cases.
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How does Phantom Code help when I'm struggling with Count Nodes With the Highest Score style questions under pressure?
The AI provides structured guidance: first the approach (what algorithm/data structure to use and why), then the implementation with clean code, and finally complexity analysis. This helps you think clearly even under pressure.
Does Phantom Code work for the coding platforms used in Count Nodes With the Highest Score interviews?
Yes. Phantom Code works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.
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