#include <iostream>
using namespace std;

double diff(int diameter);

int main() {
	// your code goes here
	printf("Diameter 1 Diff = %lf\n", diff(1));
	printf("Diameter 2 Diff = %lf\n", diff(2));
	printf("Diameter 3 Diff = %lf\n", diff(3));
	return 0;
}

double diff(int diameter)
{
	//your code here
	return 0;
}