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Grokking the Coding Interview Patterns in Go

Solution: Find Center of Star Graph

Discover how to identify the central node in a star graph by examining its edges. This lesson teaches an efficient constant-time method to detect the center node by leveraging the graph's structure. Learn to optimize graph algorithms for faster solutions while understanding core graph concepts like node degree and edge connections.

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Statement

Given an array edges where each element edges[i] = [ui, vi] represents an edge between nodes ui and vi in an undirected star graph,A star graph is a graph where one central node is connected to every other node. If there are n nodes, then the central node must be connected to all other n-1 nodes. find the central node of this star graph.

Note: A star graph is a graph where one central node is connected to every other node. This implies that a star graph with n nodes has exactly n - 1 edges.

Constraints:

  • 3≤3 \leq n ≤103\leq 10^3 ...