OJ Board

16
10 15 15 20 20 25 10 30 30 47 47 50 25 45 45 65
15 35 35 55 20 40 50 55 35 40 55 60 40 60 60 65
35 2 35 3 1 3 0 0


For problem 336(a node too fer) how (1 3) works because we have no node named 1.
What should be the output for(1 3).