View Compilation Error

0_0_11168491_3146.cpp:7: error: `_int64' does not name a type
0_0_11168491_3146.cpp: In function `int main()':
0_0_11168491_3146.cpp:22: error: `NL' undeclared (first use this function)
0_0_11168491_3146.cpp:22: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11168491_3146.cpp:32: error: `num' undeclared (first use this function)
0_0_11168491_3146.cpp:40: error: `mid' undeclared (first use this function)