#include <bits/stdc++.h>

template <class T>
inline void read(T &res)
{
	res = 0; bool bo = 0; char c;
	while (((c = getchar()) < '0' || c > '9') && c != '-');
	if (c == '-') bo = 1; else res = c - 48;
	while ((c = getchar()) >= '0' && c <= '9')
		res = (res << 3) + (res << 1) + (c - 48);
	if (bo) res = ~res + 1;
}

const int N = 3005;
const double pi = acos(-1.0);

int n, l, t[N];
double ansx, ansy;

int main()
{
	read(n); read(l);
	for (int i = 1; i <= n; i++) read(t[i]);
	for (int i = 1; i <= n; i++)
		for (int j = i + 1; j <= n; j++)
		{
			double orz = pi * (t[i] + t[j]) / l;
			ansx += cos(orz) * (n - (j - i << 1));
			ansy += sin(orz) * (n - (j - i << 1));
		}
	double sum = 1.0 * n * (n - 1) * (n - 2) / 6;
	return printf("%.14lf %.14lf\n", ansx / sum, ansy / sum), 0;
}