#include <iostream>
#define PI 3.14159265
using namespace std;

class Circle
{
public:
    int radius;
    void Circ()
    {
        cout << (radius * 2) * PI << endl;
    }
    void Area()
    {
    cout << (radius * radius) * PI << endl;
    }
};

int main()
{
    Circle main;
    cout << "Radius : ";
    cin >> main.radius;
    cout << "Circumference : ";
    main.Circ();
    cout << "Area : ";
    main.Area();
    return 0;
}