#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = 1e6 + 10;
const double Pi = acos(-1);
int n, L;
double t[N];
double sin1[N], sin2[N];
double cos1[N], cos2[N];
signed main() {
   // freopen("geometry.in", "r", stdin);
   // freopen("geometry.out", "w", stdout);
    ios::sync_with_stdio(false), cin.tie(0);
    cin >> n >> L;
    for (int i = 1, x; i <= n; i++) cin >> x, t[i] = Pi * x / L;
    for (int i = n; i >= 1; i--) {
        sin1[i] = sin1[i + 1] + sin(t[i]), sin2[i] = sin2[i + 1] + i * sin(t[i]);
        cos1[i] = cos1[i + 1] + cos(t[i]), cos2[i] = cos2[i + 1] + i * cos(t[i]);
    }
    double ansx = 0, ansy = 0;
    for (int i = 1; i <= n; i++) {
        ansx += (n + 2 * i) * (cos(t[i]) * cos1[i + 1] - sin(t[i]) * sin1[i + 1]) - 2 * (cos(t[i]) * cos2[i + 1] - sin(t[i]) * sin2[i + 1]);
        ansy += (n + 2 * i) * (sin(t[i]) * cos1[i + 1] + cos(t[i]) * sin1[i + 1]) - 2 * (sin(t[i]) * cos2[i + 1] + cos(t[i]) * sin2[i + 1]);
    }
    int p = n * (n - 1) * (n - 2) / 6;
    printf("%.15lf %.15lf", ansx / p, ansy / p);
}