Hi!

We are glad to invite you to take part in Codeforces Round 564 (Div. 1) and Codeforces Round 564 (Div. 2), they will be held on Jun/07/2019 15:05 (Moscow time). The round will be rated for both divisions.

Participants in each division will be offered 6 problems and 2 hours to solve them, including 4 shared problems for both divisions, and one of them has two versions with the only difference in constraints.

The problems were written and prepared by me, Sulfox, QAQAutoMaton, ODT, ccz181078, rushcheyo and PinkRabbitAFO.

Great thanks to 300iq for coordinating and testing the round, we enjoyed the experience of preparing a round with him.

Thanks to Um_nik, KAN, isaf27, xht37, ButterflyDew and DKACVenus for testing the round, too.

Of course, thanks to MikeMirzayanov for amazing systems Codeforces and Polygon!

Last but not least, thanks to everyone who participates in this round, for making our efforts meaningful.

Both English and Chinese editorials will be available after the contest.

UPD 1: The scoring distribution will be:

• Div.2: 500 — 1000 — 1500 — 1750 — (1250 + 1250) — 2750

• Div.1: 500 — 750 — (750 + 750) — 1750 — 2500 — 2750

UPD 2: Congratulations to the winners!

Div.1:

1. Rewinding

2. maroonrk

3. WA_TLE

4. zeronumber

5. nhho

Div.2:

1. foreverlasting

2. wifiiiiii

3. liuxiao

4. Joysh

5. YenSean

UPD 3:

The English Editorial and the Chinese Editorial are published.