View Compilation Error

0_0_18128902_14680.cpp: In function 'int main()':
0_0_18128902_14680.cpp:84:78: error: invalid operands of types '__gnu_cxx::__promote_2<int, long long int, double, double>::__type {aka double}' and 'const long long int' to binary 'operator%'
   for ( i = 1; i < len; i ++ ) ssum = (ssum+((ans-f[i])*pow(100013,len-i-1))%Mod) % Mod;
                                                                              ^