Hello, Codeforces community! <br>I'm glad to invite you to **Criterion 2021 Round 9** which will be held on [February 5, 2021 at 16:00 PM +0600 ](https://www.timeanddate.com/worldclock/fixedtime.html?msg=Criterion+2021+Round+9&iso=20210205T16&p1=%3A&ah=2&am=30) and will run for 2 hours 30 minutes.↵
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The contest will take place at **Toph.co**↵
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This contest is rated for all participants. You can register for the contest [here](https://toph.co/c/criterion-2021-round-9).↵
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Problems of this contest were prepared and tested by [user:ovis96,2021-02-04], [user:jAckAL_1586,2021-02-04], [user:Hasinur_,2021-02-04], [user:TarifEzaz,2021-02-04], [user:oasiscse,2021-02-04] and me.↵
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Thanks to [user:TarifEzaz,2021-02-04] for his unconditional support and [user:hjr265,2021-02-04] for the best contest programming platform in Bangladesh.↵
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We're inviting you all to participate in this contest. Hope you will enjoy the problem set. <br>There will be an editorial for this contest shortly after the round ends. <br>↵
Feel free to share your experience with previous **Criterion Rounds**!↵
↵
Contest Link: [Criterion 2021 Round 9](https://toph.co/c/criterion-2021-round-9)↵
↵
Happy Coding!↵
UPD: Only 30 minutes to go!
↵
The contest will take place at **Toph.co**↵
↵
This contest is rated for all participants. You can register for the contest [here](https://toph.co/c/criterion-2021-round-9).↵
↵
Problems of this contest were prepared and tested by [user:ovis96,2021-02-04], [user:jAckAL_1586,2021-02-04], [user:Hasinur_,2021-02-04], [user:TarifEzaz,2021-02-04], [user:oasiscse,2021-02-04] and me.↵
↵
Thanks to [user:TarifEzaz,2021-02-04] for his unconditional support and [user:hjr265,2021-02-04] for the best contest programming platform in Bangladesh.↵
↵
We're inviting you all to participate in this contest. Hope you will enjoy the problem set. <br>There will be an editorial for this contest shortly after the round ends. <br>↵
Feel free to share your experience with previous **Criterion Rounds**!↵
↵
Contest Link: [Criterion 2021 Round 9](https://toph.co/c/criterion-2021-round-9)↵
↵
Happy Coding!↵
UPD: Only 30 minutes to go!
