#include <iostream>

using namespace std;
class student {
private:
    string name, surname;
    int age;
public:
    student(string _name = "", string _surname = "", int _age = 0) {
        name = _name;
        surname = _surname;
        age = _age;
    }
    friend void check_age(student S);
};
void check_age(student s) {
    if(s.age > 25) {
        cout << "YES " << s.name << " " << s.surname << endl;
    }
    else {
        cout << "NO" << endl;
    }
}
int main() {
    student s("a", "b", 30);
    check_age(s);
    return 0;
}