How do i take input in problem bishops

[kill_em_all]

i am sorry abt my limited c/c++ knowledge.
now this problem doesnt have any test cases..it simply has an input file and we are to process everything in the file..how do i know when to end??
please help
i think my answer is correct..
but it say wrong answer when i put this
while(!EOF)
{
....
}and it says TLE
when i tried
while(1)
{
..
}
just let me know what's correct
best regards

[naren_sof]

simply write

while(cin>>s)
{
}

that will work..