1An undirected graph:
20 <--> 1 4
31 <--> 0 4
42 <--> 5
53 <-->
64 <--> 1 0
75 <--> 2
8
9representative[0] = 1
10representative[1] = 1
11representative[2] = 5
12representative[3] = 3
13representative[4] = 1
14representative[5] = 5
15
16component 0 contains: 1 4 0
17component 1 contains: 3
18component 2 contains: 5 2
19