[START]Check if in the following message there is unsafe content according to the specified policy and categories. Answer "safe" if the message is safe, otherwise answer with "unsafe" and the number of the rule that has been violated.
[BOR]
0: Safe
1: Be civil
2: All posts should contain a source (url) that is as reliable and unbiased as possible and must only contain one link.
3: No bots, spam or self-promotion.
4: Post titles should be the same as the article used as source.
5: Posts must be news from the most recent 30 days.
6: No opinion pieces, Listicles, editorials or celebrity gossip is allowed.
7: No duplicate posts.
8: Misinformation / propaganda is strictly prohibited.
9: No link shorteners.
10: Don't copy entire article in your post body

[EOR]
[BOC]
They do all show up at once. The program simply starts with a set number of cars at a gas station and continually refuels them until the timer is up. Also, I am not modeling the problem, this is an assignment and the method I use to solve the problem is the method I have to use.

The car tries for a pump. If none are free, the thread waits until it is notified that a pump is free at which point it checks for pumps again. 
[EOC]
safe
0
[END]

Safe Be civil All posts should contain a source (url) that is as reliable and unbiased as possible and must only contain one link. No bots, spam or self-promotion. Post titles should be the same as the article used as source. Posts must be news from the most recent 30 days. No opinion pieces, Listicles, editorials or celebrity gossip is allowed. No duplicate posts. Misinformation / propaganda is strictly prohibited. No link shorteners. Don't copy entire article in your post body