using System;

public static class MathHelper
{
    private readonly static Random s_random = new Random();

    public static double RandomDouble(double min, double max)
    {
        return (s_random.NextDouble() * (max - min)) + min;
    }

    public static float RandomFloat(float min, float max)
    {
        return (float)RandomDouble(min, max);
    }

    public static int Dice(int n)
    {
        return (int)Math.Floor(RandomDouble(0, n));
    }

    public static bool CoinFlip()
    {
        return Dice(2) == 0;
    }
}