View Compilation Error

0_0_38645246_21250.cpp: In function 'void run()':
0_0_38645246_21250.cpp:20:6: error: 'll' was not declared in this scope
  for(ll i=0;i<=n;i++)op[i]=0;
      ^~
0_0_38645246_21250.cpp:20:6: note: suggested alternative: 'ull'
  for(ll i=0;i<=n;i++)op[i]=0;
      ^~
      ull
0_0_38645246_21250.cpp:20:13: error: 'i' was not declared in this scope
  for(ll i=0;i<=n;i++)op[i]=0;
             ^