import java.io.*;

public class TastaturKasterUndtagelser
{
	private BufferedReader ind;

	public TastaturKasterUndtagelser()
	{
		ind = new BufferedReader(new InputStreamReader(System.in));
	}

	public String lęsLinie() throws IOException
	{
		String linie = ind.readLine();
		return linie;
	}

	public double lęsTal() throws IOException
	{
		String linie = lęsLinie();
		return Double.parseDouble(linie);
	}
}