View Compilation Error

0_0_11719100_8130.cpp:9: error: `_int64' does not name a type
0_0_11719100_8130.cpp:69: error: `int64' does not name a type
0_0_11719100_8130.cpp: In function `void work()':
0_0_11719100_8130.cpp:84: error: `ans' undeclared (first use this function)
0_0_11719100_8130.cpp:84: error: (Each undeclared identifier is reported only once for each function it appears in.)