The sample input clearly does not respect the spec. Per http://poj.org/problem?id=1052 it should be

5
XXXXX
X----
X--XX
X---X
XXXXX
XXXXX
X----
XXXXX
X----
XXXXX
XXXXX
X---X
XXXX-
X---X
XXXXX
3
X--
-X-
--X
XX-
XXX
-XX
-XX
XXX
XX-
0

Submission 20270603 gets AC on POJ.