#include <iostream>

using namespace std;

double r;
const double pi = 3.14159265359;

// This assignment is worth 3 points.
// -1 if input of radius is stored into an int
// -1 if any of the outputs are stored in an int

int main()
{
	cout << "Enter radius: ";
	cin >> r;

	cout << "Circumference: " << pi*2*r << endl;
	cout << "Area: " << pi*r*r << endl;

	return 0;
}