answer.code: In function ‘int main()’:
answer.code:12:5: error: ‘cin’ was not declared in this scope
   12 |     cin>>n>>c1>>c2;
      |     ^~~
answer.code:3:1: note: ‘std::cin’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
    2 | #include <stdio.h>
  +++ |+#include <iostream>
    3 | using namespace std;
answer.code:28:5: error: ‘cout’ was not declared in this scope
   28 |     cout<<ans<<"\n";
      |     ^~~~
answer.code:28:5: note: ‘std::cout’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?