#include <iostream>
#include <iomanip>
using namespace std;
int main()
{	
	int n, k;
	int sum1 = 0, sum2 = 0;
	int n1 = 0, n2 = 0;
	int i;
	cin >> n >> k;
	for (i = 1; i <= n; i++)
	{
		if (i % k == 0)
		{
			n1++;
			sum1 += i;
		}
		else
		{
			n2++;
			sum2 += i;
		}
	}
	cout << setiosflags(ios::fixed) << setprecision(1) << double(sum1 / n1) << ' ' << double(sum2 / n2);
	return 0;
}```