Hello Codeforces!
I have a pleasure to invite you to (https://mirror.codeforces.com/contests/1361)[Codeforces Round #647 (Div. 1)] and (https://mirror.codeforces.com/contests/1362)[Codeforces Round #647 (Div. 2)]. This round will take place on [Thursday, June 4th, 2020, at 16:35]. In both divisions, you will have 2.5 hours to solve 6 problems, three problems shared.
The problems for this round were prepared by MicGor, Grzmot, Okrut, and me.
I would like to thank everyone who made this round possible: — budalnik, for the excellent coordination — Lewin, sstrong for invaluable advice — KrK, yarek, -is-this-fft-, w0nsh, Marckess, Ari, Fortin, Dup4, craborac, 300iq for taking the time to test and providing useful feedback — MikeMirzayanov for great platforms Codeforces and Polygon
We hope you will enjoy the problem set! Good luck!