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 |  
 
	import java.io.*;
 
	public class EntreeClavier{
 
	        public static int readInt(){
	                boolean flag = false;
	                int i = -1;
	                while(!flag){
	                        String s = "";
	                        try{
	                                char c;
	                                for(c = (char)System.in.read(); 
	                                c != '\n' && c != '\r'; 
 
	                                c = (char)System.in.read())
 
	                                	s = s + c;
	                                if(c == '\r')
	                                c = (char)System.in.read();
 
	                                i = Integer.parseInt(s);
	                                flag = true;
	                        }
	                        catch(IOException ioexception){
	                        System.out.println("Erreur");
	                }
	                catch(NumberFormatException numberformatexception){
	                        System.out.println("Erreur enter un nombre");
	                }
	        }
	        return i;
	    }
 
	    public static int readInt(String s){
	        System.out.print(s);
	        return readInt();
	    }
 
	    public static float readFloat(){
	        boolean flag = false;
	        float f = 0.0F;
	        while(!flag){
	                String s = "";
	                try{
	                        char c;
	                        for(c = (char)System.in.read(); c != '\n' && c != '\r'; c = (char)System.in.read())
	                            s = s + c;
 
	                        if(c == '\r')
	                            c = (char)System.in.read();
	                        f = Float.parseFloat(s);
	                        flag = true;
	                }
	                catch(IOException ioexception){
	                        System.out.println("Erreur");
	                }
	                catch(NumberFormatException numberformatexception){
	                        System.out.println("Erreur entez un nombre");
	                }
	        }
	        return f;
	    }
 
	    public static float readFloat(String s){
	        System.out.print(s);
	        return readFloat();
	    }
 
	    public static double readDouble(){
	        boolean flag = false;
	        double d = 0.0D;
	        while(!flag){
	            String s = "";
	            try{
	                char c;
	                for(c = (char)System.in.read(); c != '\n' && c != '\r'; c = (char)System.in.read())
	                    s = s + c;
 
	                if(c == '\r')
	                    c = (char)System.in.read();
	                d = Float.parseFloat(s);
	                flag = true;
	            }
	            catch(IOException ioexception){
	                System.out.println("Erreur");
	            }
	            catch(NumberFormatException numberformatexception){
	                System.out.println("Erreur entez un nombre");
	            }
	        }
	        return d;
	    }
 
	    public static double readDouble(String s){
	        System.out.print(s);
	        return readDouble();
	    }
 
	    public static char readChar(){
	        char c = ' ';
	        try{
	            char c1 = (char)System.in.read();
	            c = c1;
	            for(; c1 != '\n' && c1 != '\r'; c1 = (char)System.in.read());
	            if(c1 == '\r')
	                c1 = (char)System.in.read();
	        }
	        catch(IOException ioexception){
	            System.out.println("Erreur");
	        }
	        return c;
	    }
 
	    public static char readChar(String s){
	        System.out.print(s);
	        return readChar();
	    }
 
	    public static String readString(){
	        String s = "";
	        try{
	            char c;
	            for(c = (char)System.in.read(); c != '\n' && c != '\r'; c = (char)System.in.read())
	                s = s + c;
 
	            if(c == '\r')
	                c = (char)System.in.read();
	        }
	        catch(IOException ioexception){
	            System.out.println("Erreur");
	        }
	        return s;
	    }
 
	    public static String readString(String s){
	        System.out.print(s);
	        return readString();
	    }
 
	    public static void attente(){
	        try {
	            System.in.read();
	        }
	        catch(IOException ioexception) {
	        }
	    }
	} | 
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