Having participated in one informatics olympiad, not as a contestant but as a service engineer for the duration of the contest, I spent quite some time observin

Having participated in one informatics olympiad, not as a contestant but as a service engineer for the duration of the contest, I spent quite some time observing the contestants. It appeared to me that different teams had different preparation levels. I could see contestants from a few countrlies starting to type immediately after seeing the subject, when most countries teams struggled. My guess was that some countries had a more organized approach, when others were more based on personal effort and talent for the preparation.