#include <stdio.h>
#include <iostream>

using namespace std;

int main()
{
	int N, F;

	while (scanf("%d %d", &N, &F) != EOF)
	{
		long C[N];

		for (int i = 0; i < N; i++)
		{
			long pond;
			scanf("%ld", &pond);
			C[i] = pond;
		}

		long cumF = 0;
		long cumV = 0;
		double T1 = C[N - 1] / (double)F;

		for (int i = N - 1; i >= 0; i--)
		{
			cumF += F;
			cumV += C[i];

			if (cumV / (double)cumF < T1)
			{
				T1 = cumV / (double)cumF;
			}
		}

		cumF = 0;
		cumV = 0;
		double T2 = 0;

		for (int i = 0; i < N; i++)
		{
			cumF += F;
			cumV += C[i];

			if (cumV / (double)cumF > T2)
			{
				T2 = cumV / (double)cumF;
			}
		}

		printf("%.8f %.8f\n", T1, T2);

		//cout << T1 << " " << T2 << "\n";
	}

	return 0;
}