JuniorGraph Theory
Find Center of Star Graph
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 of the given star graph.
Example 1
Input
edges = [[1,2],[2,3],[4,2]]Output
2Node 2 is connected to every other node, so 2 is the center.
Example 2
Input
edges = [[1,2],[5,1],[1,3],[1,4]]Output
1Node 1 is connected to every other node, so 1 is the center.
Constraints
- 3 <= n <= 10^5
- edges.length == n - 1
- edges[i].length == 2
- 1 <= ui, vi <= n
- ui != vi
- The given
edgesrepresent a valid star graph.