#include<cmath>
#include<cstdio>
using namespace std;

inline int read()
{
	int x = 0, f = 1; char ch = getchar();
	for (; ch < '0' || ch > '9'; ch = getchar()) if (ch == '-') f = -1;
	for (; ch >= '0' && ch <= '9'; ch = getchar()) x = (x << 1) + (x << 3) + ch - '0';
	return x * f;
}

const double pi = acos(-1.0);
const int N = 3e3 + 5;

double t[N];

int main()
{
	int n = read();
	int L = read();
	for (int i = 1; i <= n; ++i) t[i] = read();
	
	double ansx = 0.0;
	double ansy = 0.0;
	for (int i = 1; i <= n; ++i)
		for (int j = i + 1; j <= n; ++j)
		{
			double ang = 1.0 * (t[i] + t[j]) * pi / L;
			double x = cos(ang);
			double y = sin(ang);
			
			ansx += x * (n - 2 * (j - i));
			ansy += y * (n - 2 * (j - i));
		}
	
	long long m = 1LL * n * (n - 1) * (n - 2) / 6;
	printf("%.12f %.12f\n", ansx / m, ansy / m);
	
	return 0;
}
