import java.util.Scanner;
import java.util.Random;


public class approximate_pi {
	public static void main(String[] args)
	{
		long total_points = 0; // total points counter
		long inside_points = 0; // counter for points inside circle
		
		Random r = new Random(); // random object
		double api = 0; // approximate value of pi, initially set to 0
		for(;;)
		{
			double x = r.nextDouble()*2 - 1;// random numbers between -1 and 1
			double y = r.nextDouble()*2 - 1;

			double length  = Math.sqrt(x*x + y*y); // length of vector from origin
			if(length<1) // means point is inside circle
			{
				inside_points++; 
			}
			total_points++;// total points increase
			
			api = 4*(double)(inside_points)/(double)total_points; // approximate pi
			
			if( (api>3.141) && (api<3.1419)) // if within some threshold, we stop
			{
				break;
			}
		}
		
		
		// report results
		System.out.println("Total number of points: " + total_points);
		System.out.println("Inside points: " + inside_points);
		System.out.println("Approximate value of pi is: " + api);
	}
}