import java.lang.*;
import java.util.*;


class Buffer
{
  private int buf[]=new int [5];
  private int in;  
  private int out;

  Buffer () {    in=0; out=0;   }

  synchronized int get() 
  { 
    	while(in==out) {  try{wait();} catch(InterruptedException e) {}  }
    	int el=buf[out];
    	out=(out+1)%5; 
    	notify(); 
    	return el;
  }
  
  synchronized void put(int el)
  {
  	while((in+1)%5==out) { try{wait();} catch(InterruptedException e) {}    }
    	buf[in]=el;
    	in=(in+1)%5; 
    	notify();
  }
}

class Cons extends Thread{
  Buffer b; int id;
  Cons(Buffer p, int n) { this.b=p; id=n;}
  public void run()  {
    while(true)
    	{ int el=b.get(); System.out.println("C" + id + " consumo: " + el); }
  }
}

class Prod extends Thread {  
  Buffer b;  Random r;
  Prod(Buffer p){ this.b=p; r=new Random(); }
  public void run(){
    while (true)
	{ int el=r.nextInt()%10; b.put(el); System.out.println("P-Ho prodotto:  "+el); }
  }
}
class jsp10 {  // Classe principale contentene il main 
  static Buffer buf=new Buffer();
  public static void main(String Arg[])
  {    
    	Prod  	a=new Prod(buf);
    	Cons  	b=new Cons(buf,0);
    	Cons 	c=new Cons(buf,1);
    	a.start();     b.start();     c.start();
  }
}