Hi everyone! I would like to share a contest from problems I suggested in some programming school. These problems are by my own and some by Mosyagin. Is starts on this Wednesday at 18:00 Moscow time (see your timezone https://www.timeanddate.com/worldclock/fixedtime.html?day=24&month=2&year=2021&hour=18&min=0&sec=0&p1=166). You will be given 8-9 problems. I think they are educational a bit(but may be not all). I would be glad if you will participate and give me some feedback. Don't be too strict anyway it's one of my first such experience though I always wanted to make a contest. You can find contest in gym with name Kaliningrad Krosh Contest 1.

Contest at last will be held at 18:00 Moscow Time.

I think problem difficulty-level is from cyan to purple-orange.

Edit: I decided to add one more problem so you will be given 10 problems. Contest starts in 11 minutes! Good luck!

Edit: Thanks for participation! Congratulation to winners: 1. Maksim1744 2. thenymphsofdelphi 3. YouKn0wWho 4. golikovnik 5. BForBrute: DrearyJoke, Yomapeed

Tutorial of 8 of 10 problems(except E and J): https://drive.google.com/file/d/1i_H_OFlPyx4uAtzD4r6PxRxI2bEXs76V/view?usp=sharing