using System;

public class Program

{

    public static void Main()

    {

        double lado = 100;//Convert.ToDouble(Console.ReadLine());

        double areaCuadro = lado*lado;

        int cantidad = 1000000;

        Random rand = new Random();

        double radio = lado/2;

        double a = radio,b = radio;

        double percentage;

        int cont = 0;

        Console.WriteLine(rand.NextDouble()*100);

        for(int i=0; i<cantidad; i++)

            {

                if(InTheCircle(radio,rand.NextDouble()*100, rand.NextDouble()*100, a, b))

                    cont++;

            }

        percentage = 1.0*cont/cantidad*100;

        Console.WriteLine(percentage);

        double pi = (4 * percentage) / areaCuadro;

        Console.WriteLine(pi);

    }

    public static bool InTheCircle(double radio,double x, double y, double a, double b)

    {

        bool isInTheCircle = false;

        double r2 = ((x-a)*(x-a)) + ((y-b)* (y-b));

            if(r2 <= radio*radio )

                isInTheCircle = true;

        return isInTheCircle;

    }

}