import java.io.*;
	class Saisie {
	public static String lire_String ()
	{
		String ligne_lue=null ;
		try {
		InputStreamReader isr = new InputStreamReader(System.in);
		BufferedReader br = new BufferedReader(isr);
		ligne_lue = br.readLine ();
		}
		catch (IOException e) {System.err.println(e);}
		return ligne_lue;
	}
	public static String lire_String (String question)
	{
		System.out.print (question);
		return (lire_String());
	}
	public static int lire_int ()
	{
		return Integer.parseInt (lire_String ());
	}
	public static int lire_int (String question)
	{
		System.out.print (question);
		return (lire_int());
	}
	
	public static double lire_double()
	{
		return Double.parseDouble (lire_String ());
	}
	public static double lire_double (String question)
	{
		System.out.print (question);
		return (lire_double());
	}
	
	public static float lire_float()
	{
		return Float.parseFloat (lire_String ());
	}
	public static float lire_float (String question)
	{
		System.out.print (question);
		return (lire_float());
	}
	
	public static char lire_char()
	{
		String reponse = lire_String ();
		return reponse.charAt(0);
	}
	public static char lire_char (String question)
	{
		System.out.print (question);
		return (lire_char());
	}
}