View Compilation Error

0_0_8312502_5021.cpp:11:20: stdafx.h: No such file or directory
0_0_8312502_5021.cpp:12: error: `__int64' does not name a type
0_0_8312502_5021.cpp: In function `int main(int, char**)':
0_0_8312502_5021.cpp:21: error: `__int64' undeclared (first use this function)
0_0_8312502_5021.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8312502_5021.cpp:21: error: expected `;' before "ans"
0_0_8312502_5021.cpp:22: error: `ans' undeclared (first use this function)
0_0_8312502_5021.cpp:27: error: `scanf' undeclared (first use this function)
0_0_8312502_5021.cpp:33: error: `fec' undeclared (first use this function)
0_0_8312502_5021.cpp:33: error: `printf' undeclared (first use this function)