View Compilation Error

0_0_17351209_20978.cpp: In function 'long long int computer()':
0_0_17351209_20978.cpp:39:41: error: invalid operands of types '__gnu_cxx::__promote_2<long long int, int, double, double>::__type {aka double}' and 'const int' to binary 'operator%'
     ans = (ans * pow(f[m-2],mod - 2)) % mod;
                                         ^
0_0_17351209_20978.cpp:40:41: error: invalid operands of types '__gnu_cxx::__promote_2<long long int, int, double, double>::__type {aka double}' and 'const int' to binary 'operator%'
     ans = (ans * pow(f[n-2],mod - 2)) % mod;
                                         ^