answer.code: In function ‘int main()’:
answer.code:40:22: error: ‘i’ was not declared in this scope
   40 |             dfs(dfs, i);
      |                      ^
answer.code: At global scope:
answer.code:45:5: error: ‘cout’ does not name a type
   45 |     cout << ans << "\n";
      |     ^~~~
answer.code:46:5: error: expected unqualified-id before ‘return’
   46 |     return 0;
      |     ^~~~~~
answer.code:47:1: error: expected declaration before ‘}’ token
   47 | }
      | ^