2022 US Open Contest

The USACO 2022 US Open Contest has recently ended. You can find results here.

The US Open contest is the final of four contests we have hosted this season. It serves as our national championship contest, and carries particularly high weight when selecting finalists to invite to attend our summer training camp at Clemson University in late May, from which a team of four will be selected to represent the USA at the 2022 International Olympiad in Informatics (IOI).

We will also be inviting top female participants to train at our camp, as we select a team to attend the 2022 European Girls Olympiad in Informatics (EGOI). If you are a gold or platinum USA competitor identifying as female and wish to be considered for potential selection in this process, please email the USACO director Brian Dean (bcdean@clemson.edu) so we can be sure to consider you (this is helpful because our database does not currently track which participants are male vs. female).

Gmail Delivery Issues

We have been made aware that gmail has recently stopped accepting some emails from the USACO server -- e.g., for new accounts and password resets. If this issue is affecting you, please try adding usaco@usaco.org to your gmail contacts list. If you are still having issues, please notify the contest director, Brian Dean (bcdean@clemson.edu). If you have recently received an email from the USACO server such as a password reset email or an account creation email, consider starring it, so that gmail will hopefully treat USACO emails with better priority.

Impressive Results at IOI 2021!

Congratulations to Timothy Feng (gold medal), Siyong Huang (gold medal), Rain Jiang (gold medal), and Richard Qi (silver medal), who represented the USA at the 2021 International Olympiad in Informatics (IOI), hosted by Singapore.

Impressive Results at EGOI 2021!

Congratulations to Rayna Arora (silver medal), Tarushii Goel (silver medal), Vivian Han (bronze medal), and Claire Zhang (gold medal), who represented the USA at the 2021 European Girls Olympiad in Informatics (EGOI), hosted by Switzerland.

USA Team Participating in EGOI 2021 Announced

We are thrilled to announce the selection of the team that will be representing the USA at the 1st European Girls Olympiad in Informatics in mid-June:

• Rayna Arora (James Logan High School, CA),
• Tarushii Goel (Thomas Jefferson HS for Science and Technology, VA),
• Vivian Han (Mission San Jose High School, CA), and
• Claire Zhang (Montgomery Blair High School, MD).

Finalists for 2020-2021 Season Announced

The USACO is pleased to announce its finalists for the 2020-2021 season, who will be participating in our training camp in late May / early June and competing for selection for the USA team for the International Olympiad in Informatics.

IOI 2020: 1st Place for Third Year in a Row!

Congratulations to Walden Yan (gold medal), Danny Mittal (silver medal), Xinyang (Alan) Chen (gold medal), and William Lin (gold medal, 1st place individual winner), who represented the USA at the 2020 International Olympiad in Informatics. This is the 3rd year in a row where the USA team has fielded the 1st place individual winner at the IOI.

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.

First Place at IOI 2019!

Congratulations to the USA team attending the 2019 IOI in Baku, Azerbaijan. From left to right: Eric Zhang (gold), Benjamin Qi (gold, 1st place individual winner), Daniel Zhang (gold), and and William Lin (silver).

First Place at IOI 2018!

Congratulations to the USA IOI team for a superb showing at the 2018 International Olympiad in Informatics in Tsukuba, Japan! From left to right: Spencer Compton (gold), Eric Zhang (gold), Benjamin Qi (gold, 1st place individual winner), and William Hu (bronze).

Training Pages Now Support Python

For those who prefer coding in Python, our training pages now support submission of programs written in Python 2.7 or Python 3.6.

Your Account

2021-2022 Schedule

Dec 17-20: First Contest
Jan 28-31: Second Contest
Feb 25-28: Third Contest
Mar 25-28: US Open
May 26-June 4: Training Camp
Aug 7-14: IOI 2022 in Indonesia