666666 ac

66#include <iostream>
using namespace std;

int main() {
double r;
cin >> r;
double u = r * 2;
double c = r * 2 * 3.14159;
double s = r * r * 3.14159;
printf("%.4lf %.4lf %.4lf", u, c, s);
return 0;
}

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