answer.code: In function ‘int solve()’:
answer.code:93:3: error: expected ‘;’ before ‘ll’
   93 | 12
      |   ^
      |   ;
   94 |         ll res = pr_d;
      |         ~~
answer.code:99:17: error: ‘res’ was not declared in this scope
   99 |                 res += cur_cap;
      |                 ^~~
answer.code:101:17: error: ‘res’ was not declared in this scope
  101 |         cout << res << '\n';
      |                 ^~~