Hello Codeforces! We (dqa2021, Xiejiadong, Retired_xryjr233, Z18 and me) are excited to invite you to take part in Codeforces Round 664 (Div. 1) and Codeforces Round 664 (Div. 2), which will happen on Aug/12/2020 17:35 (Moscow time).

Huge thanks to:

• 300iq for coordinating our round
• gamegame, KonaeAkira, gtrhetr, jqdai0815, mayaohua2003, crasysky, aryanc403, RainAir, dqa2021, dingwanren, world_top_1_AD_uzi, Juanzhang, _Aaryan_, GavinZheng, taran_1407, yijan, whuang369, jhdonghj112 for testing and providing feedback.
• [MikeMirzayanov] for Codeforces and Polygon platforms.

There will be 6 problems in both round and you'll be given <> hours to solve them.

Good luck!