The compiler is Microsoft ® Visual C# 2005 Compiler version 8.00.50727.42 (.NET Framework 2.0). The most of problems can be solved using C#, except for those that can't be solved with Java (1220, 1275, 1306).
The default decimal separator is now set to “.” All C# submissions to problems with floating-point numbers in input or output were rejudged. The verticts of about 800 submissions of 100 authors were changed.
I have try to make some optimisation of input-output, but native read of stream does not bring some significant effect, and try of use Win32 api functions faults with runtime error on test 1 of task 1000. Where is the way to looking for?