View Compilation Error

0_0_29522782_4293.cpp:8:22: error: 'OP7KQUW' does not name a type
 typedef long long ll;OP7KQUW
                      ^
0_0_29522782_4293.cpp: In function 'll qc(ll, ll)':
0_0_29522782_4293.cpp:16:31: error: 'mod' was not declared in this scope
             ans = (ans + a) % mod;
                               ^
0_0_29522782_4293.cpp:17:15: error: 'mod' was not declared in this scope
   a = a * 2 % mod;
               ^
0_0_29522782_4293.cpp: In function 'int main()':
0_0_29522782_4293.cpp:49:14: error: 'mod' was not declared in this scope
         read(mod);
              ^