The USIOT (United States Informatics Olympiad Team) selects participants to represent the USA in the IIOT (International Informatics Olympiad in Teams). Each competition season starts with a practice round, following that year’s syllabus and familiarizing competitors with the contest system. After the practice round, there are four online qualifying rounds each year, held in a different month over four consecutive months. In March, there is an in-person national finals in Connecticut, consisting of the top teams from the qualification rounds. Teams consist of up to four pre-college students, with two additional reserves if needed. To be eligible, team members must not turn 20 before July 1st of the year of the international finals. Only one team member can be in USACO Platinum or have previously competed at the IIOT finals as part of Team USA. Detailed team rules are outlined in the USIOT Official Rules. The USIOT also has an official Discord server, which is linked here.

Participants can use C, C++, or Pascal. Each competition lasts three hours and includes solving 7 to 9 problems. The international competition lasts four hours and has the same number of problems. On the day of the competition, a banner with the link to start will be posted at 11:00 AM EST(8:00 AM PST) on this website. Once you begin, a personal three-hour countdown starts, and your test will automatically submit the next day at 2:00 PM EST(11:00 AM PST) or when the time runs out. You can practice using past IIOT problems, which are accessible by looging into the USIOT website, and at the bottom of this page. During the contest, you will have two computers.

Results will be posted on the USIOT website within a week of each competition, and after the third round, a list of teams invited to the national finals will be announced. The top 8 to 14 teams (depending on participation numbers after the first qualification round) will qualify for the national finals, where they will compete to become Team USA for that current competition season and go to the IIOT international finals.

Good luck!

Links to Previous IIOT Problems and Syllabus:

- Kilonova Problems
- Training Problems
- IIOT 2023 International Finals Tasks
- IIOT Algorithms Syllabus