#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <algorithm>
#include <utility>
#include <queue>
#include <cmath>
#include <cassert>
#include <iostream>
#include <string>
#include <map>
#include <set>
#include <iomanip>
#define mkp make_pair
#define pb push_back
#define IOS ios_base::sync_with_stdio(0),cin.tie(0)
using namespace std;
typedef pair<int,int> pii;
typedef long long ll;
const int maxn=2e5+5;
const int mod=1e9+7;
const int INF=2147483647;
const double pi=acos(-1.0);
int A[3005];
int main(){
	IOS;
	int n,L;
	cin>>n>>L;
	double x=0,y=0;
	for(int i=0;i<n;i++){
		cin>>A[i];
	}
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			x+=-cos(pi*(A[i]+A[j])/L)*(j-i-1)+cos(pi*(A[i]+A[j])/L)*(n-2-j+i+1);
			y+=-sin(pi*(A[i]+A[j])/L)*(j-i-1)+sin(pi*(A[i]+A[j])/L)*(n-2-j+i+1);
		}
	}
	cout<<setprecision(20)<<x*6/n/(n-1)/(n-2)<<' '<<y*6/n/(n-1)/(n-2)<<'\n';
	return 0;
}
