View Compilation Error

0_0_17918926_29018.cpp: In function 'int main()':
0_0_17918926_29018.cpp:4:13: 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_17918926_29018.cpp:76:33: note: in expansion of macro 'mod'
   printf("%lld\n",pow(26,n-cnt)%mod);
                                 ^