View Compilation Error

0_0_8881555_30908.cpp: In function `int JC(int, int)':
0_0_8881555_30908.cpp:5: error: `_int64' undeclared (first use this function)
0_0_8881555_30908.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8881555_30908.cpp:5: error: expected `;' before "sum1"
0_0_8881555_30908.cpp:8: error: `sum1' undeclared (first use this function)
0_0_8881555_30908.cpp:10: error: `sum2' undeclared (first use this function)