Ok I asked what's wrong with my source and I recieved reply
that I can't use assign and reset but since i use them in a
way so that they refer to the standard I/O I checked to see
if they are really the problem.I submited solution to 1000
with assign, reset, close, rewrite used and the system
accepted it.Can you please state clearly what can and what
can't be used and also what is the restricted function in
the source that i posted.Also what kind of compiler do you
use.Is it 32 bit compiler that allows big arrays?