View Compilation Error

806989_0_0_29236.cpp: In function `int main()':
806989_0_0_29236.cpp:4: error: `_int64' undeclared (first use this function)
806989_0_0_29236.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
806989_0_0_29236.cpp:4: error: expected `;' before "ans"
806989_0_0_29236.cpp:5: error: `n' undeclared (first use this function)
806989_0_0_29236.cpp:9: error: `m' undeclared (first use this function)
806989_0_0_29236.cpp:10: error: `ans' undeclared (first use this function)