//---Saisie.java

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 Integer.parseInt(lire_String());}

 public static double lire_double()
    {return Double.parseDouble(lire_String());}
  
 public static double lire_double(String question)
    {System.out.print(question);
	 return Double.parseDouble(lire_String());}
 
 public static char lire_char()
    {String reponse=lire_String();
	 return reponse.charAt(0);}   
 
 public static char lire_char(String question)
    {System.out.print(question);
	 String reponse=lire_String();
	 return reponse.charAt(0);}
}