699
Using a ruler is optional
(links.rocks)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Not just the one time. The swiss bombed it via artillery once (blew up some deck chairs in the only ski resort), started a forest fire with anti-air missiles, set up an observation post, and had soldiers march in like 5 times.
https://en.m.wikipedia.org/wiki/Liechtenstein%E2%80%93Switzerland_relations