class Ideone{
	String f(int n,double a,double b){return n>0?f(n-1,(a+b)/2,Math.sqrt(a*b)):a+","+b;}
	public static void main (String[] args){
		Object[][] testcases = new Object[][]{
			{0, 24d, 6d},
			{1, 24d, 6d},
			{2, 24d, 6d},
			{5, 24d, 6d},
			{10, 100d, 50d},
			{10, 1d, 1.41421356237d}
		};
		for(int i=0;i<testcases.length;i++){
			System.out.println(new Ideone().f(
				(int)testcases[i][0],
				(double)testcases[i][1],
				(double)testcases[i][2]
			));
		}
	}
}

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