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2451465
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Your system's answers: WA-14, AC, WA-13

In real these solutions give SAME answers on all tests.

Please, answer me.

Compiler for C++ = Intel C++ Compiler 7.0, which is adjusted to be compatible with Microsoft Visual Studio 7.0
Compiler for C# = Microsoft Visual C# 2008 version 3.5.30729.1 (.NET Framework 3.5)

Why don't you use Microsoft Visual C++ 2008 ?
I've already got a lot of troubles with this "adjusted to be compatible" compiler.

It is known issue for ICL 7.0:
  printf("%I64d\n", (long long)1e15);
produces output
  2147483647

Thank you! =)

Hm...

__int64 inf = floor(1e13); works OK
but
__int64 inf = 1e13; gets WA-13

Aaaa!!! What don't I know about reduction of types in C++ yet? :)