Dear Codeforces,

I am very excited to invite you to our first round of Criterion 2020 Round. The round will start from 0900 UTC on 31 January 2020. Criterion rounds will be held once every two weeks and will have 5-6 problems over the duration of 2.5 hours. You can register for the contest here.

The authors of the today's contest are: Dhruba10414, Hasinur_, Moshiur_, Shefin_, I_love_ProParThinkNot, Hasnaine_ and tanus_era.

See you in the arena!