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You just lost the bet, I am using Windows 2000.

But I was able to solve the runtime error - now I get WA. I assume my program was accessing bad indexes in an array (like a[-1][0], let's say). I don't know where the error is, but this is much better.

You can use freopen - works at least in Visual C++ 6

I have the same problem. And it is not related to pointers or anything else - the code run flawlessly on both Visual C++6 and djgpp, ver 3.31 C compiler.
I assume it is related to the C compiler version of the jury - or maybe the runtime system