package no347; 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 derivative = 0; double integral = 0; for(int i=0;i<n;i++) { double a = sc.nextDouble(); derivative += a * Math.pow(b, a - 1); if (a == -1) { integral += Math.log(b); }else{ integral += Math.pow(b, a + 1) / (a + 1); } } pd(derivative); pd(integral); } public static void pd(double d) { System.out.printf("%.5f\n",d); } }