2025-2026 Finalists Announced

The USACO is pleased to announce its finalists for the 2025-2026 season, all invited to participate in our training camp in late May. Along with these finalists we are thrilled to announce the team members representing the USA at the 2026 European Girls Olympiad in Informatics (team members representing the USA for the 2026 International Olympiad in Informatics will be selected at camp).

2025-2026 Competition Schedule Recap

Our 2025-2026 competition season was structured slightly differenly from past years, with three on-line contests in early 2026 followed by a proctored invitational "US Open" championship contest. Top USA competitors from the online contests were be invited to participate in the final proctored contest, which was the primary determinant of who we selected to invite to our 2026 training camp as a finalist, as well as the four individuals who will represent the USA at the 2026 EGOI (this year the EGOI is held prior to our camp, necessitating an earier selection process; the EGOI team and top EGOI prospects for future years are still invited to our camp for training). Participants in our platinum division were also initially reset to the gold division at the start of the season, a practice we may continue in the future.

This year should be considered somewhat transitional as we gain experience with how to most effectively implement our final proctored contest. The same (bronze, silver, gold, platinum) division structure remained in place this year for stability, but this may possibly be tweaked slightly in the future to place more emphasis on yearly results stemming from the final proctored contest.

Excellent Results at 2025 IOI and EGOI

Congratulations to the USA team for their strong results at IOI 2025 in Bolivia: Brian Xue (silver), Alex Chen (bronze), Bing-Dong Liu (silver), and Rain Jiang (gold). Congratulations as well to Pearl Yu (bronze), Helen Law (gold), Luna Hudman (gold), and Grace Li (gold) for their outstanding results while representing the USA at 2025 European Girls Olympiad in Informatics in Germany!

2024-2025 Finalists Announced

The USACO is pleased to announce its finalists for the 2024-2025 season, all invited to participate in our training camp in late May 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 and historical contest problems (complete with solutions) that students can use to improve their programming and computational problem-solving skills.
• On-line programming contests (four 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. We also select a team of the top four female high-school students in the USA to compete at the European Girls' Olympiad in Informatics (EGOI), a competition of similar prestige modeled after the European Girls' Mathematical Olympiad.

We are indebted to our amazing volunteer staff and to our sponsors for their support of our mission.

Your Account

2025-2026 Schedule

Jan 9-12: First Contest
Jan 30-Feb 2: Second Contest
Feb 20-23: Third Contest
For each contest, USA students
wishing to receive a certified
score in the platinum or gold
contest must start Saturday at
12:00 ET, when problems in those
divisions will be first released
(see contest details for
more detailed instructions)

Mar 28: US Open (Proctored)

May 12-18: EGOI (Italy)
May 21-30: Training Camp
Aug 9-16: IOI (Uzbekistan)