Time: [Feb 7, 11:00 UTC+3](https://www.timeanddate.com/worldclock/fixedtime.html?msg=GP+of+Nizhny+Novgorod&iso=20210207T11&p1=1908&ah=5)↵
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Link: [Click](https://official.contest.yandex.ru/opencupXXI/contest/24668/enter) (OpenCup login needed to participate)↵
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Authors: [user:Um_nik,2021-02-05], [user:Merkurev,2021-02-05], [user:KAN,2021-02-05], [user:WYOCMWYH,2021-02-05] with help from [user:I_Remember_Olya_ashmelev,2021-02-05], [user:Ferume,2021-02-05], [user:fake123,2021-02-05] and [user:dario2994,2021-02-05].↵
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The contest was used for Petrozavodsk training camp and ICPC training camp.↵
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[Editorial](https://drive.google.com/file/d/1wMYEFKSoT1mkpK0V16LQ1wjlbxksgo7X/view?usp=sharing)
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Link: [Click](https://official.contest.yandex.ru/opencupXXI/contest/24668/enter) (OpenCup login needed to participate)↵
↵
Authors: [user:Um_nik,2021-02-05], [user:Merkurev,2021-02-05], [user:KAN,2021-02-05], [user:WYOCMWYH,2021-02-05] with help from [user:I_Remember_Olya_ashmelev,2021-02-05], [user:Ferume,2021-02-05], [user:fake123,2021-02-05] and [user:dario2994,2021-02-05].↵
↵
The contest was used for Petrozavodsk training camp and ICPC training camp.↵
↵
[Editorial](https://drive.google.com/file/d/1wMYEFKSoT1mkpK0V16LQ1wjlbxksgo7X/view?usp=sharing)