View Compilation Error

0_0_7912180_29425.cpp:4: error: `_int64' does not name a type
0_0_7912180_29425.cpp: In function `int main()':
0_0_7912180_29425.cpp:18: error: `_int64' undeclared (first use this function)
0_0_7912180_29425.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7912180_29425.cpp:18: error: expected `;' before "n"
0_0_7912180_29425.cpp:19: error: `n' undeclared (first use this function)
0_0_7912180_29425.cpp:25: error: expected `;' before "num"
0_0_7912180_29425.cpp:26: error: `num' undeclared (first use this function)