p min 10 20
n 1 11
n 10 -11
a 1 2 0 12 2
a 1 4 0 15 4
a 1 8 0 3 1
a 2 9 0 15 1
a 2 1 0 12 1
a 3 5 0 12 2
a 3 2 0 3 2
a 4 8 0 15 4
a 4 10 0 15 4
a 4 5 0 7 5
a 5 6 0 12 1
a 6 7 0 12 5
a 6 2 0 6 1
a 6 9 0 6 5
a 7 4 0 15 5
a 8 10 0 15 5
a 8 4 0 15 4
a 8 6 0 7 5
a 9 3 0 12 5
a 9 2 0 15 4