Hello Codeforces!

I'm glad to announce that we will be having **Round 33** of **MathMash** today at **17: 00 UTC**. The round has been prepared by **Snpushpita** and DrSwad.

The round will consist of 8 problems, to be solved within 2 hours.

Points distribution for the problems are decided as `500-750-1000-1500-2000-2750-3000-3000`

We're inviting you all to join us in the contest. Hopefully we'll have a fun and successful round.

A few details about the contest:

In order to participate in the contest, you need to register first. Kindly follow

**this link**to do so. Registration deadline has been removed from the contests. So now, you can register at any time before the contest ends.I know this announcement is being placed in a coding website, but unfortunately using computer programs for MathMash contests is not allowed. We are trying to reward users' math skills with high ratings as there are not many sites that do this yet. We also try our best to set up the problems in such a way that any trivial brute force approach isn't supposed to work (for the mediocre/difficult problems).

**Time-penalty**is applicable for the contest: Each problem is given an appropriate number of points, which will be visible when the round starts. Participants will gain**that many points — the time penalty**after successfully submitting to a particular problem. The later the problem submission occurs, the more points being deducted due to time penalty.The round is

**rated**; which means that if you participate in the contest, your rating will be updated at the end of the round based on your rank in it. But you won't be considered as participating in the round if you don't submit any answer at all, even if you're registered for the contest.

can we submit solutions after the contest end. If yes how to do the same. Do we just have to submit the answer. And can we use a computer program to calculate the same.

Yes, you just need to submit the answer. Also you can upsolve the problems. You can find all the previous contest problems from here.

Using computer programs to solve the problems is not allowed(But using a calculator for the answer is. For example, suppose you found out that the answer to a problem would be 2

^{20}. There's no point in calculating it by hand. It's okay to use a calculator to get it quickly). Although you may find that the easier problems are programmable. I am not too much concerned about making them code-proof, since you can solve them much faster mathematically anyway.You may find a few more information about the contest system in the faq page here.

I have noticed that many of the unofficial problems are similar to

project Eulerproblems, is that allowed since the website stands only for math non-computational problems? shouldn't the unofficial problems be approved first by an admin before publishing them to insure that they meet some criteria and quality?