Hi Codeforces!

We are glad to invite you to our first Codeforces Round Codeforces Round 738 (Div. 2) which will be held on 15.08.2021 17:35 (Московское время). This round will be rated for participants with rating less than 2100. We will be glad to see participants from the first division to join out of competition as well!

In this round, as the best friend of Mocha's, you are going to help her to solve the problems she meets.

The problems are prepared by 2sozx, JJLeo, Serval, Oshwiciqwqq and me. We hope you will enjoy the round. :P

We would like to thank:

• Monogon for coordination of this round and helping us improve our problems.

• Toxel for testing and discussion of this round.

• cppascalinux, PurpleCrayon, ijxjdjd, wxhtzdy, qxforever, fixed_lxy, HKvv, jxm2001, GGN_2015, I-AK-ACM, wzy2001wzy, xrbxbn, insere, zhtjtcz, lgwza, qwertyczx, godel_bach, withinlover, Saisyc, Matrix53, rancy, asrinivasan007, QuangBuiCPP, dream_love_atcoder, Atlantis592, shakugan_no_shanatan_, DovahkiinGA and 5095187020216 for testing our rounds

• MikeMirzayanov for the amazing Codeforces and Polygon platforms.

You will be given 6 problems to solve in 2 hours.

Scoring distribution: 500—750—1000—(1500—1500)—3000.

We recommend you to read the statements of all problems. Good luck & Have fun! :D