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