#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-8;
const ll mod=1e9+7;
const int dx[4]={-1,0,1,0},dy[4]={0,-1,0,1};

ll n,m;
vl a;

int main(){
	cin>>n>>m;
	a=vl(n);
	for(auto &i:a) cin>>i;
	double X=0,Y=0;
	for(int i=0;i<n;i++){
		int t=n-2;
		for(int j=(i+1)%n;t;j=(j+1)%n){
			double arg=pi*(a[i]+a[j]+(j<i?m:0))/m;
			X+=cos(arg)*t;
			Y+=sin(arg)*t;
			t--;
		}
	}
	X/=n*(n-1)*(n-2)/6;
	Y/=n*(n-1)*(n-2)/6;
	cout<<syosu(11)<<X<<' '<<Y<<endl;
}