// Race.java
// wyscig

class Counter {
	private int _val;

	public Counter(int n) {
		_val = n;
	}

	public void inc() {
		_val++;
	}

	public void dec() {
		_val--;
	}

	public int value() {
		return _val;
	}
}

class IThread extends Thread {
	private Counter _cnt;

	public IThread(Counter c) {
		_cnt = c;
	}

	public void run() {
		for (int i = 0; i < 100000; ++i) {
			_cnt.inc();
		}
	}
}

class DThread extends Thread {
	private Counter _cnt;

	public DThread(Counter c) {
		_cnt = c;
	}

	public void run() {
		for (int i = 0; i < 100000; ++i) {
			_cnt.dec();
		}
	}
}

class Race {
	public static void main(String[] args) {

		for (int i = 0; i < 10; i++) {
			Counter cnt = new Counter(0);
			IThread it = new IThread(cnt);
			DThread dt = new DThread(cnt);

			it.start();
			dt.start();

			try {
				it.join();
				dt.join();
			} catch (InterruptedException ie) {
			}

			System.out.println("value=" + cnt.value());
		}
	}
}