Hello, CODEFORCES!!!

I have a friend writes on BORLAND PACSAL and I'm on C++. And if it had a higher rating than me!!((( But C++ steeper PASCAL, why???(((( I think in the problem B error , not specified file from which to read the data!! Because the line condition can be very large, a fair number of characters, do judges will be in manual to dial these lines and if they oshibutsja when typing?? It knocked me down so I was not able to solve it(((( Tell me which file to read the data and if it's a direct solution algorithms, thanks!

I'm new here, sorry if that is not so!! THANK you all for your answers!!! :))))