OJ Board

I don't Know Why don't work my program, I put it the most difficult input (a 9x9 square with all the arists) in it and solve it right.

input:

9
144
H 1 1
H 1 2
H 1 3
H 1 4
H 1 5
H 1 6
H 1 7
H 1 8
H 2 1
H 2 2
H 2 3
H 2 4
H 2 5
H 2 6
H 2 7
H 2 8
H 3 1
...
V 9 6
V 9 7
V 9 8


Output:

64 square (s ...