Hello!
In the Caribbean Online Judge has been created a new style of competition called Progressive Contest, this type of contest has been well received by users who have participated and each time increasing the number of competitors, including several countries. I invite you to join and try this new style, and leave here in the comments what you think. The next contest is scheduled at this link, and there you can see more details: http://coj.uci.cu/contest/contestview.xhtml?cid=1301
PS: I am one of the contestants in the Caribbean. :)