import java.util.*; public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); Random rnd = new Random(); int n=sc.nextInt(); int k=sc.nextInt(); double v=0; for(int i=0;i<5000000;i++){ int sumt=0; int sumj=0; for(int j=0;jsumj)v++; } System.out.println(v/5000000); } }