// The "Problem1" class.
import java.awt.*;
import java.io.*;

public class Problem1
{

    public static void main (String[] args) throws IOException
    {
	BufferedReader input = new BufferedReader (new FileReader ("DATA1.txt"));
	PrintWriter output = new PrintWriter (new FileWriter ("OUT1.txt"));

	for (int d = 0 ; d < 5 ; d++)
	{
	    String line_1 = input.readLine ();
	    String line_2[] = line_1.split (" ");
	    double num[] = new double [2];

	    for (int e = 0 ; e < 2 ; e++)
		num [e] = Double.parseDouble (line_2 [e]);

	    // changing to radian
	    num [0] = num [0] * (Math.PI / 180);

	    double distance = 0;
	    distance = num [1] * Math.cos (num [0]) * ((2 * num [1] * Math.sin (num [0])) / 9.81);

	    output.println ((int) (Math.round (distance)));
	}
	output.close ();
    } // main method
} // Problem1 class