Hello, Codeforces!

I am glad to invite you to take part in Codeforces Round #577 (Div 2), which will be held on Sunday, 4 August at 16:35 UTC.

You will be given 5 problems, one of them will have 2 subtasks and 2 hours to solve them.

The round will be rated for the second division.

Huge thanks to cdkrot and KAN for helping to prepare the round.

I would like to thank to 300iq, isaf27, vintage_Vlad_Makeev, pllk, mohammedehab2002, 74TrAkToR, Rox, _overrated_ for testing the round.

And thanks to MikeMirzayanov for the great codeforces and polygon platforms.

This is my first Codeforces round. Hope you will enjoy it.

Good luck and have fun!

UPD: The scoring distribution is: 500 — 1000 — 1500 — 2000 — (2000 + 1000)

UPD2: Editorial

UPD3: Congratulations to the winners:

Div2:

1: wwaynetuu

2: jerome_mei

3: satu0king

4: Yazmau

5: Tlatoani

Unofficial Div1:

1: neal

2: uwi

3: scott_wu

4: I_love_Tanya_Romanova

5: ecnerwala