USA Computing Olympiad

USACO offers free algorithmic-programming contests in which students read problems, design efficient algorithms, implement solutions, and submit code to an online judge. Divisions progress from Bronze through Silver and Gold to Platinum, covering topics from sorting and search to dynamic programming, graph algorithms, and advanced data structures. The 2025–26 season used three four-day online contest windows in January and February followed by a proctored March 28 US Open; top U.S. students advanced to the May training camp, where four-person IOI and EGOI teams were selected.