View Compilation Error

872017_0_0_7283.cpp:4: error: `int64' has not been declared
872017_0_0_7283.cpp:5: error: ISO C++ forbids declaration of `m' with no type
872017_0_0_7283.cpp: In function `int solve(int, int, int, int)':
872017_0_0_7283.cpp:6: error: `int64' undeclared (first use this function)
872017_0_0_7283.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
872017_0_0_7283.cpp:6: error: expected `;' before "mid"
872017_0_0_7283.cpp:7: error: `mid' undeclared (first use this function)
872017_0_0_7283.cpp: In function `int main()':
872017_0_0_7283.cpp:18: error: `int64' undeclared (first use this function)
872017_0_0_7283.cpp:18: error: expected `;' before "m"
872017_0_0_7283.cpp:19: error: `m' undeclared (first use this function)