View Compilation Error

0_0_5972771_19690.cpp:2: error: `_int64' does not name a type
0_0_5972771_19690.cpp: In function `int main()':
0_0_5972771_19690.cpp:17: error: `_int64' undeclared (first use this function)
0_0_5972771_19690.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5972771_19690.cpp:17: error: expected `;' before "a"
0_0_5972771_19690.cpp:18: error: `a' undeclared (first use this function)
0_0_5972771_19690.cpp:18: error: `b' undeclared (first use this function)
0_0_5972771_19690.cpp:20: error: `max' undeclared (first use this function)
0_0_5972771_19690.cpp:21: error: `i' undeclared (first use this function)
0_0_5972771_19690.cpp:22: error: `num' undeclared (first use this function)