Leetcode 1791: Find center of Star Graph

In this Leetcode problem, we are given a list of edges representing a star graph. A star graph is a graph where all the edges contain the “center” node. This is the problem statement:

There is an undirected star graph consisting of n nodes labeled from 1 to n. A star graph is a graph where there is one center node and exactly n - 1 edges that connect the center node with every other node.

You are given a 2D integer array edges where each edges[i] = [ui, vi] indicates that there is an edge between the nodes ui and vi. Return the center…