每辆车只计数到达50，增量计数信号量(一次)。
Each car simply counts up and upon reaching 50, increments the counting semaphore (once) too.
嫉妒是抛开自己的幸运，而只计数他人幸运的艺术。
Jealousy is the art of counting someone else blessings instead of your own.
嫉妒是抛开自己的幸运，而只计数他人幸运的艺术。不要把自己的时间浪费在嫉妒上，我们自己才是自己唯一的劲敌。
Jealousy is the art of counting someone else blessings instead of your own Don't waste your time on jealousy the only person you're competing against is yourself.
应用推荐