US Open Contest

Our final contest of the 2023-2024 season, the US Open, has recently ended. Results are available here.

The USACO coaches are deliberating now on who to invite as finalists to our 2024 summer training camp; decisions on this should be out soon.

2023-2024 Competition Schedule Released

We are looking forward to a competition season in 2023-2024 with four contests, much like in previous years. At the end of the season, teams will be chosen to represent the USA at the International Olympiad in Informatics in Egypt and the European Girls Olympiad in Informatics in the Netherlands.

Two important notes regarding changes / clarifications in contest structure and rules for this season, in the interest of ensuring academic integrity:

• We have added text to our contest rules clarifying that generative AI is prohibited during our contests, and that USA students are not allowed to use VPNs to obscure their IP addresses.
• For USA students participating in a platinum contest, you will earn a certified score if you start the contest between 12:00 noon and 12:15 eastern time (ET) on the Saturday of the larger Friday-Monday contest timeframe. Certified scores carry more weight during finalist selection. This special timing currently only affects platinum contests, not other divisions. That is, platinum problems become available only at noon ET on the Saturday of the contest window; all other divisions can be launched earlier, on the Friday morning of the Friday-Monday contest timeframe. Students who wish to receive full consideration for selection as a finalist to attend our training camp should try to receive certified scores on all of the platinum contests. Realizing that schedules are sometimes hard to coordinate, students with three instead of four certified scores will still receive full consideration. Students who have fewer than three certified scores due to promotion from gold to platinum mid-season may also be considered for finalist status (in this case, the more certified scores, the better).

Outstanding Results at 2023 IOI and EGOI

We are thrilled to have won four gold medals at the 2023 International Olympiad in Informatics in Szeged, Hungary! Congratulations to Austin Geng, Agastya Goel, Rohin Garg, and Rain Jiang, who represented the USA at the event. Congratulations as well to Maria Chrysafis (silver), Tina Wang (gold), Yeyin (Eva) Zhu (gold), and Luoluo (Christina) Li (bronze) for their outstanding results while representing the USA at 2023 European Girls Olympiad in Informatics in Lund, Sweden!

2022-2023 Finalists Announced

The USACO is pleased to announce its finalists for the 2022-2023 season, all invited to participate in our training camp in late May / early June to compete for selection for the USA teams attending the International Olympiad in Informatics and the European Girls Olympiad in Informatics.

Our Mission

The USACO supports computing education in the USA and worldwide by identifying, motivating, and training high-school computing students at all levels. We provide:

• Hundreds of hours of free on-line training resources that students can use to improve their programming and computational problem-solving skills.
• On-line programming contests (roughly six per year) for students at all levels.
• An intensive summer training camp, to which the top students in the USA are invited to further improve their skills and learn advanced material.
• The opportunity for the top four students in the USA to represent their country at the International Olympiad in Informatics (IOI), the most prestigious international algorithmic programming competition at the high-school level.

Your Account

2023-2024 Schedule

Dec 15-18: First Contest
Jan 26-29: Second Contest
Feb 16-19: Third Contest
Mar 15-18: US Open
For each contest, USA students
wishing to receive a certified
score in the platinum contest
must start Saturday at
12:00 ET, when platinum problems
will be first released
(see contest details for
more detailed instructions)

May 23-June 1: Training Camp
Jul 21-27: EGOI (The Netherlands)
Sep 1-8: IOI (Egypt)