Subsequent vertex index array:
0 2 2 2 4 -1 
2 1 2 2 4 -1 
0 3 2 3 3 -1 
1 1 1 3 1 -1 
3 3 3 3 4 -1 
3 3 3 3 3 5 
An array of shortest path lengths between vertices:
0 45 10 25 45 MAX 
35 0 15 30 5 MAX 
20 35 0 15 40 MAX 
55 20 35 0 25 MAX 
85 50 65 30 0 MAX 
58 23 38 3 28 0 
