using static System.Math;
using System;

public class Hello
{
    static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        var p = double.Parse(Console.ReadLine().Trim());
        getAns(n, p);
    }
    static void getAns(int n, double p)
    {
        if (n >= 200) Console.WriteLine(1);
        else
        {
            var pb = 1d - p;
            var ans = 1d - (Pow(pb, n));
            Console.WriteLine(ans);
        }
    }
}