<a href="http:&#x2F;&#x2F;codelift.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;codelift.org&#x2F;</a> is an elevator challenge a friend of mine[0] built that&#x27;ll throw scenarios of various numbers of floors and elevators at you.<p>[0]: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;user?id=silvamerica" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;user?id=silvamerica</a>