import java.io.*;
public class Input
{   static BufferedReader stdin = new BufferedReader
	               (new InputStreamReader(System.in));
    
    public static int kluku(String messu) 
    {   boolean ok= false;
	int arvo=0;
	System.out.print(messu);
	while (ok == false)
	{   try 
	    {arvo = Integer.parseInt(stdin.readLine());
	     ok = true;
	    }
	    catch (Exception e)
	    {System.out.println("Ei ollut kokonaisluku! Uusi");
	     ok = false;
	    }
	}
	return(arvo);
    }

	public static long ikluku(String messu) 
    {   boolean ok= false;
	long arvo=0L;
	System.out.print(messu);
	while (ok == false)
	{   try 
	    {arvo = Long.parseLong(stdin.readLine());
	     ok = true;
	    }
	    catch (Exception e)
	    {System.out.println("Ei ollut kokonaisluku! Uusi");
	     ok = false;
	    }
	}
	return(arvo);
    }
	
    public static float fluku(String messu) 
    {   float arvo=0F;
	boolean ok = false;
	System.out.print(messu);
	while (ok==false)
	{   try
	    {arvo = Float.valueOf(stdin.readLine()).floatValue();
	     ok = true;
            }
	catch (Exception e)
	    {System.out.println("Ei ollut desiluku! Uusi");
	     ok = false;
	    }
         }
	return(arvo);
     }

	public static double dluku(String messu) 
    {   double arvo=0;
	boolean ok = false;
	System.out.print(messu);
	while (ok==false)
	{   try
	    {arvo = Double.valueOf(stdin.readLine()).doubleValue();
	     ok = true;
            }
	catch (Exception e)
	    {System.out.println("Ei ollut desiluku! Uusi");
	     ok = false;
	    }
         }
	return(arvo);
     }

    public static String mjono(String messu) 
    {   String arvo = null;
	boolean ok = false;
	System.out.print(messu);
	while (ok==false)
	{   try
	    {arvo = stdin.readLine();
	     ok = true;
            }
	catch (Exception e)
	    {System.out.println("Lukemisessa ongelmia! Uusi");
	     ok = false;
	    }
         }
	return(arvo);
    }

	public static char merkki(String messu) 
    {   char arvo = ' ';
	boolean ok = false;
	System.out.print(messu);
	while (ok==false)
	{   try
	    {arvo = (stdin.readLine()).charAt(0);
	     ok = true;
            }
	catch (Exception e)
	    {System.out.println("Lukemisessa ongelmia! Uusi");
	     ok = false;
	    }
         }
	return(arvo);
    }
	
	public static boolean looginen(String messu) 
    {   boolean arvo=false;
	boolean ok = false;
	System.out.print(messu);
	while (ok==false)
	{   try
	    {arvo = Boolean.valueOf(stdin.readLine()).booleanValue();
	     ok = true;
            }
	catch (Exception e)
	    {System.out.println("Ei ollut true tai false! Uusi");
	     ok = false;
	    }
         }
	return(arvo);
     }

}