using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NMi => ReadLine().Split().Select(c => int.Parse(c) - 1).ToArray();
    static int[][] NMap(int n) => Enumerable.Repeat(0, n).Select(_ => NMi).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var p = double.Parse(ReadLine());
        if (n >= 200)
        {
            WriteLine(1);
            return;
        }
        var ans = 1.0;
        for (var i = 0; i < n; ++i) ans *= 1 - p;
        WriteLine(1 - ans);
    }
}