View Compilation Error

0_0_29546752_21153.cpp: In function 'll polya(int, int)':
0_0_29546752_21153.cpp:8:13: error: invalid operands of types '__gnu_cxx::__promote_2<int, int, double, double>::__type {aka double}' and 'int' to binary 'operator%'
 #define mod 1000000007 
             ^
0_0_29546752_21153.cpp:49:27: note: in expansion of macro 'mod'
  }return ans*pow(n,mod-2)%mod;
                           ^