Welcome to another Weekend Practice, a regular programming contest open to all skill levels and backgrounds!
This is rated competition for everyone.
Format and Difficulty
Same as the previous rounds, the competition is primarily aimed at improving practical skills. You will be given 2 hours to solve 5 problems of varying difficulty, the easiest of which can even be solved by beginners.
The scoring for each task being block-based, meaning points are awarded for each block of tests separately, and only if the solution passes all tests in the block. If there is a tie between two participants, the one whose last productive submission (i.e., a submission that added at least one point) was made earlier will be ranked higher in the leaderboard.
Registration
You can register for the competition by clicking "Join" on the top of this page.
Prizes
The top-10 participants of the competition, as well as 10 random participants from those who rank from 11th to 100th place, will receive prizes in the form of t-shirts.
Visit the Frequently Asked Questions section to learn more.
Call for Tasks
We are looking for problem setters to help us prepare for the upcoming rounds. Learn more about how to submit problem.
Credits
We are very thankful to everyone who helped prepare this round:
denisovkostya for coordinating the contest
MathModel, denisovkostya for authoring the problems
Sponsors
This round is sponsored by Acai Travel.
Acai Travel
Acai Travel is a seed-stage startup using AI to transform customer support in the travel industry. With $4M in funding and partnerships with leading global brands, our AI assistant integrates with travel and airline systems to deliver real-time information, automate ticket routing, analyze sentiment, and generate smart auto-replies—boosting efficiency and enhancing customer experiences.
We work with cutting-edge AI to solve real problems, not to chase trends. Our team, based in New York, Barcelona, and Pune, builds practical solutions rooted in strong values, curiosity, and a culture that fosters innovation and positive change.