// Incremental Process

class Inc extends Thread{
private Counter c;
private final static int often=10;

	Inc(Counter c){ this.c=c; }

	public void run(){
		for(int i=0; i<often; i++){
			int tmp=c.get();
			tmp++;
			yield();
			c.set(tmp);
		}
	}

	public static void main(String[] args){
		Counter c=new Counter();
		for(int i=0; i<3; i++)
			new Inc(c).start();
	}
}