import java.util.Scanner;

public class main {
    public static void main(String[] args){
        Scanner sc= new Scanner(System.in);
        int n = sc.nextInt();
        int b = sc.nextInt();
        double a;
        double j,k;
        double x1=0,x2=0;
        for (int i=0; i<n;i++){
            a = sc.nextDouble();
            j=a-1.0;
            k=a+1.0;
            x1 += a* Math.pow(b,j);
            if(a==-1.0){
                x2 += Math.log(n);
            }else {
                x2 += 1 / k * Math.pow(b, k);
            }
        }
        System.out.println(x1);
        System.out.println(x2);
    }
}