View Compilation Error

0_0_33889266_10112.cpp:6:7: error: 'll' does not name a type
 const ll mod = 1e9 + 7;
       ^
0_0_33889266_10112.cpp: In function 'int main()':
0_0_33889266_10112.cpp:43:30: error: 'mod' was not declared in this scope
         printf("%lld\n", ans%mod);
                              ^