#include <bits/stdc++.h>
#define REP(i,n,N) for(int i=(n);i<(int) N;i++)
#define p(s) cout<<(s)<<endl
using namespace std;

int main(){
	int n,b;
	double a,in=0,di=0;
	cin>>n>>b;
	REP(i,0,n){
		cin>>a;
		di+=a*pow(b,a-1);
		if(a==-1)in+=log(b);
		else in+=pow(b,a+1)/(a+1);
	}
	printf("%.5lf\n%.5lf\n",di,in);
	return 0;
}