class binomial
{
	public static void main(String arg[])
	{
		System.out.println("B(0,3,0.65) : " + binomial(0,3,0.65));
		System.out.println("B(1,3,0.65) : " + binomial(1,3,0.65));
		System.out.println("B(2,3,0.65) : " + binomial(2,3,0.65));
		System.out.println("B(3,3,0.65) : " + binomial(3,3,0.65));
	}

	public static double binomial(int x, int n, double p)
	{
		long comb = combinatoria(n,x);
		return (double) comb * Math.pow(p,x) * Math.pow(1-p,n-x);	
	}

	public static long combinatoria(int n, int x )
	{
		int dif, term;
		double comb = 1; 
   
		dif =  Math.max(x , n - x);
		term = Math.min(x , n - x);
      
		for (int i = 1;  i <= term ; i++)  
		{
			int aux = i + dif;
			comb *= (double) ( i + dif ) / i;
		}
      
		return (long) comb;
	}

}