View Compilation Error

0_0_39115147_15940.cpp: In function 'int main()':
0_0_39115147_15940.cpp:15:9: error: 'll' was not declared in this scope
   15 |         ll n;
      |         ^~
0_0_39115147_15940.cpp:16:20: error: 'n' was not declared in this scope
   16 |         while(cin>>n)
      |                    ^