An undirected graph (edge list):
(0,1) (1,4) (4,0) (2,5) 

Total number of components: 3
Vertex 0 is in the component who's representative is 1
Vertex 1 is in the component who's representative is 1
Vertex 2 is in the component who's representative is 5
Vertex 3 is in the component who's representative is 3
Vertex 4 is in the component who's representative is 1
Vertex 5 is in the component who's representative is 5

component 0 contains: 4 1 0 
component 1 contains: 3 
component 2 contains: 5 2