Finally after a year the Izho 2026 Olympiad has started. I wonder where we can find Day1 standings of Izho 2026 Olympiad.

Thanks for attention!

Upd1: scoreboard for day1

Hi everyone!

After a contest Codeforces Round 1028 (Div. 2), i came up with an issue.

A solution that passed system testing during the contest was resubmitted after the round with no changes at all, and guess what it got WA23 322350733!

This made me wonder:

• were the testcases added after the contest?
• if so, shouldn't all accepted submissions be retested to keep things fair?

It's a bit confusing to see two different verdicts for the same code. If this kind of thing is possible, maybe it would be good to clarify how it's handled officially.

Has anyone seen this happen before?

what happened, why we cant see submissions while hacking phase?

its been a while since last rating rollback?

Wen next rating rollback?

What happened??

How to handle this judge?

it is weird

From March 10th to March 20th, I had the chance to attend a Competitive Programming (CP) camp led by Kamil (kamilszymczak1). Over 10 intense yet fun-filled days, I improved my problem-solving skills, learned new techniques, and bonded with fellow participants. Here's a quick overview of my experience:

Daily Structure: Coding, Learning, and Fun

Each day, we started with a contest from 9:00 AM to 2:00 PM, featuring 3 problems that challenged our programming abilities. After the contest, from 3:00 PM to 5:00 PM, there was an editorial session where participants who scored 100 points on at least one problem explained their solutions. This was a great chance to learn different approaches and earn chocolates for explaining the problem!

In the evenings, we had lectures on algorithms and techniques to help us with the day’s problems. Afterward, we were free to upsolve or practice on Codeforces, or even play sports to unwind. By 9:00 PM, we’d order some fast-foods, usually from KFC or Max-Way, and relax together.

The Last Day: Special Visits and Prizes

On the final day, we visited parks and centers, followed by a meeting with the Minister of Education to discuss the importance of competitive programming. We also explored IT-Park and Uzinfocom, gaining insights into the tech industry. To wrap it up, we were awarded prizes for our efforts during the camp.

Key Takeaways

• Time Management: Learning how to manage time during contests was crucial.

• Collaboration: Sharing solutions in the editorial sessions was a great way to learn from others.

• Industry Insights: Visits to IT-Park and Uzinfocom showed how competitive programming skills can apply in real-world tech jobs.

• Balance: The mix of coding, free time, and fun food moments made the camp an enjoyable experience.

Final Thoughts

The CP camp was a fantastic way to improve my skills and meet other passionate programmers like Timosh. Thanks to Kamil (kamilszymczak1), I now feel more confident in tackling tough problems. If you're looking to boost your competitive programming skills, I highly recommend joining such a camp. It’s a perfect mix of learning and fun!

Finally after a year the Izho 2025 Olympiad has started. I wonder where we can find Day1 standings of Izho 2025 Olympiad.

Thanks for attention!

Upd: scoreboard for day1

Upd: Day2 started)

its been 4-5 contests we are waiting for rollback

When rollback?

any news about Info1Cup 2025?

How I Improved My Problem-Solving Skills on Codeforces

When I started competitive programming on Codeforces, I found it hard to keep up with the speed of contests. Over time, I learned strategies that helped me get better. Here’s a quick summary of what worked for me:

1. Master the Basics

• Learned important algorithms like binary search and sorting.
• Practiced simple data structures like arrays and hash maps.
• Solved problems rated 800-1200 to build confidence and improve speed.

2. Practice with Focus

• Worked on weak topics (e.g., greedy, bitmasks) and solved harder problems step by step.
• Used Codeforces’ "tags" to find problems on specific topics.
• After contests, solved the problems I couldn’t complete during the competition.

3. Participate in Contests Regularly

• Focused on solving the easiest problems first to avoid mistakes.
• Took part in virtual contests to practice working under time pressure.
• Studied editorial solutions and wrote the code to learn better methods.

4. Learn from Mistakes

• Kept a list of common mistakes, like missing edge cases or coding errors.
• Checked my solutions to make them simpler and faster.
• Asked questions in the discussion section when I didn’t understand something.

5. Be Consistent

• Set small goals, like solving a few problems every week.
• Followed experienced users and studied their solutions to learn new ideas.
• Celebrated achievements, like reaching a higher rating or solving a difficult problem.

Improving on Codeforces takes time and effort, but every problem you solve helps you move forward. Stay consistent, take on challenges, and you’ll see progress. Share your tips and experiences in the comments—I’d love to hear how you’re doing!

1. The Speed Demon: Solves the first problems in 3-4 minutes, then disappears.

2. The Debugger: Spends half the contest fixing one off-by-one error.

3. The Code Golfer: Writes solutions in a single unreadable line of code.

4. The Rating Enthusiast: Cries or celebrates for hours depending on the delta.5.

5. The Strategist: Spends 90% of the contest figuring out which problem to solve.

6. The Meme Lord: Writes problem comments or variable names as jokes.

7. The Optimizer: Finds a $$$O(\log n)$$$ solution for a $$$O(n)$$$ problem unnecessarily.

8. The Tester: Runs stress tests even for the simplest problems.

9. The Philosopher: Comments on the beauty (or lack thereof) of a problem's logic.

10. The Perfectionist: Refuses to submit until every edge case is covered.

11. The Hacker : Spends 30% of the contest solving the easy problems and the remaining 70% stress-testing others' solutions.

Which one are you, or do you have a new archetype to add? Let me know in the comments!

Hello Codeforces Community.

I need a help to reach Specialist. These days i'm solving problems in range 1500-1700, you can also add me to your friends to see my results in contests, but not Specialist yet. So, can you give me some tips or algos i need to learn to reach Specialist!

Thanks in advance!

Hi everyone. I recently started learning Segment Tree. So now I want to solve more problems with Segment Tree in Codeforces. Can you suggest me some problems similar to a Segment Tree, like 896E - Welcome home, Chtholly? So I can improve myself?

Thanks in advance!

I would like to thank cry and sum for the contest Codeforces Round 952 (Div. 4). I enjoyed questions, they were so good. I'm glad to be a participant in this Round.

I also want to thank MikeMirzayanov for his polygon!

Thanks you Codeforces!

Hello Codeforces, I have a request. Please can you make a list of TOP 20 Young Coders whose age is under 15.

Thanks in advance!

Hello Codeforces, I wanted to tell you about user with handle kamroncik . He is cheater and he proved it himself. I want you to check his solutions like this 263278363. You can see that he chopped it from ChatGPT. I offer you to check this user. I think you comprehended me.

Thank, you!