View Compilation Error

0_0_37814616_9938.cpp: In function 'long long int mul(long long int, long long int)':
0_0_37814616_9938.cpp:12:13: error: expected primary-expression before 'long'
 #define int long long
             ^
0_0_37814616_9938.cpp:51:12: note: in expansion of macro 'int'
     return int((LL)a * b % mod);
            ^
0_0_37814616_9938.cpp:12:13: error: expected ';' before 'long'
 #define int long long
             ^
0_0_37814616_9938.cpp:51:12: note: in expansion of macro 'int'
     return int((LL)a * b % mod);
            ^
0_0_37814616_9938.cpp:12:13: error: expected primary-expression before 'long'
 #define int long long
             ^
0_0_37814616_9938.cpp:51:12: note: in expansion of macro 'int'
     return int((LL)a * b % mod);
            ^