answer.code: In function ‘int main()’:
answer.code:57:9: error: ‘ll’ was not declared in this scope
   57 |         ll res = 0;
      |         ^~
answer.code:63:25: error: ‘res’ was not declared in this scope
   63 |                         res += cnt[1] + cnt[2] + cnt[3];
      |                         ^~~
answer.code:67:17: error: ‘res’ was not declared in this scope
   67 |         cout << res << '\n';
      |                 ^~~