2025 January Contest -- Final Results
The 2025 January contest featured algorithmic programming problems covering a wide range of techniques and levels of difficulty.
A total of 11565 distinct users logged into the contest during its 4-day span. A total of 9450 participants submitted at least one solution, hailing from 100+ different countries. 4276 participants were from the USA, with high levels of participation also from China, Canada, Korea, Romania, Malaysia, India, and Singapore.
In total, there were 23508 graded submissions, broken down by language as follows:14190 C++17 3324 Python-3.6.9 3069 C++11 2763 Java 127 C 35 Python-2.7.17
Below are the detailed results for each of the platinum, gold, silver, and bronze contests. You will also find solutions and test data for each problem, and by clicking on any problem you can practice re-submitting solutions in "analysis mode". If you are logged in, you will also see your own specific results below alongside the contest(s) you took.
USACO 2025 January Contest, Platinum
The platinum division had 352 total participants, of whom 254 were pre-college students. Results for top scorers are here. Congratulations to all of the top participants for their excellent results!
1
2
3
USACO 2025 January Contest, Gold
The gold division had 1032 total participants, of whom 738 were pre-college students. All competitors who earned certified scores of 700 or higher on this contest are automatically promoted to the platinum division. The list of USA pre-college students who were promoted can be found here.
1
2
3
USACO 2025 January Contest, Silver
The silver division had 4070 total participants, of whom 3072 were pre-college students. All competitors who scored 700 or higher on this contest are automaticalaly promoted to the gold division.
1
2
3
USACO 2025 January Contest, Bronze
The bronze division had 6735 total participants, of whom 5060 were pre-college students. All competitors who scored 700 or higher on this contest are automatically promoted to the silver division.
1
2
3
Final Remarks
Yet another challenging contest! From a technical perspective, all went well during the January contest. We saw strong levels of participation and a reasonable number of participants being promoted.
For those not yet promoted, remember that the more practice you get, the better your algorithmic coding skills will become -- please keep at it! USACO contests are designed to challenge even the very best students, and it can take a good deal of hard work to excel at them. To help you fix any bugs in your code, you can now re-submit your solutions and get feedback from the judging server using "analysis mode".
A large number of people contribute towards the quality and success of USACO contests. Those who helped with this contest include Alex Liang, Tina Wang, Chongtian Ma, Haokai Ma, Richard Qi, Thomas Liu, Claire Zhang, Larry Xing, Benjamin Chen, Weiming Zhou, Daniel Zhang, Eric Yang, Spencer Compton, William Lin, Danny Mittal, David Hu, Suhas Nagar, Nathan Wang, Brandon Wang, Michelle Wei, Nick Wu, Ho Tin Fan, Andi Qu, and Benjamin Qi, Thanks also to our translators for their help in extending the reach of our contests. Finally, we are exceedingly grateful to the USACO sponsors for their generous support: Citadel, Ansatz, X-Camp, TwoSigma, VPlanet Coding, EasyFunCoding, Orijtech, and Jump Trading.
We look forward to seeing everyone again soon for our February contest.
Happy coding!
-- Brian Dean
Professor and Director, School of Computing, Clemson University
Director, USACO