View Compilation Error

0_0_4302962_10302.cpp:3: error: `_int64' does not name a type
0_0_4302962_10302.cpp: In function `int main()':
0_0_4302962_10302.cpp:14: error: `_int64' undeclared (first use this function)
0_0_4302962_10302.cpp:14: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4302962_10302.cpp:14: error: expected `;' before "n"
0_0_4302962_10302.cpp:15: error: `n' undeclared (first use this function)
0_0_4302962_10302.cpp:17: error: `f' undeclared (first use this function)