View Compilation Error

0_0_1205397_29037.cpp:4: error: `int64' has not been declared
0_0_1205397_29037.cpp:5: error: ISO C++ forbids declaration of `m' with no type
0_0_1205397_29037.cpp: In function `int solve(int, int, int, int)':
0_0_1205397_29037.cpp:6: error: `int64' undeclared (first use this function)
0_0_1205397_29037.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1205397_29037.cpp:6: error: expected `;' before "mid"
0_0_1205397_29037.cpp:7: error: `mid' undeclared (first use this function)
0_0_1205397_29037.cpp: In function `int main()':
0_0_1205397_29037.cpp:18: error: `int64' undeclared (first use this function)
0_0_1205397_29037.cpp:18: error: expected `;' before "m"
0_0_1205397_29037.cpp:19: error: `m' undeclared (first use this function)