class Test5_14
{ 
	public static void main(String[] args)
	{ 
       		double m=50;
       		double n=((int)Math.random())*100;
       		double area1,area2;
       		area1=m*Math.PI;
       		area2=n*Math.PI;
       		System.out.println(Сǡ+Math.min(area1,area2));
	}
}
