View Compilation Error

0_0_17025999_3489.cpp: In function 'int main()':
0_0_17025999_3489.cpp:13:13: error: expected unqualified-id before numeric constant
 #define mod 9973
             ^
0_0_17025999_3489.cpp:27:13: note: in expansion of macro 'mod'
         int mod=n%k;
             ^