Hello, everyone! [Codeforces Round #631](https://mirror.codeforces.com/contests/1329,1330) will be held at [contest_time:1329].↵
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The problems are almost from me([user:dreamoon_love_AA,2020-04-01]), except one problem of which the idea is from [user:drazil,2020-04-01] and developed by me. Also we want to thank [user:300iq,2020-04-01] for helping me prepare the round, [user:isaf27,2020-04-01], [user:tmt514,2020-04-01], [user:rowdark,2020-04-01], [user:yp155136,2020-04-01], [user:wangyenjen,2020-04-01], [user:n_dao107,2020-04-01] and [user:zj713300,2020-04-01] for testing this round, and MikeMirzayanov for Codeforces and Polygon.↵
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This is my third time organizing a problemset for a Codeforces round (my previous rounds: [Codeforces Round #292](https://mirror.codeforces.com/contests/515,516), [Codeforces Round #320](https://mirror.codeforces.com/contests/578,579)).↵
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Good luck and have fun!↵
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**UPD**: Below is a message for you from [user:MikeMirzayanov,2020-04-02]:↵
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_About two weeks ago, we completed the crowdfunding campaign dedicated to the 10th anniversary of Codeforces. Community help inspires and provides resources for the development and operation of the platform. Thanks! With this round, we want to say thank you to Denis [user:aramis,2020-04-02] Shitov, for his significant contribution and support. It is valuable, important and very nice when people from the community lend a helping hand and congratulate. Thank you, Denis!_↵
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**UPD2**: Also thanks to [user:Shik,2020-04-03] for testing the round!↵
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**UPD3**: Score distribution:↵
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- Div2: 500 1000 1500 1750 2500↵
- Div1: 500 750 1500 2000 2500
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The problems are almost from me([user:dreamoon_love_AA,2020-04-01]), except one problem of which the idea is from [user:drazil,2020-04-01] and developed by me. Also we want to thank [user:300iq,2020-04-01] for helping me prepare the round, [user:isaf27,2020-04-01], [user:tmt514,2020-04-01], [user:rowdark,2020-04-01], [user:yp155136,2020-04-01], [user:wangyenjen,2020-04-01], [user:n_dao107,2020-04-01] and [user:zj713300,2020-04-01] for testing this round, and MikeMirzayanov for Codeforces and Polygon.↵
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This is my third time organizing a problemset for a Codeforces round (my previous rounds: [Codeforces Round #292](https://mirror.codeforces.com/contests/515,516), [Codeforces Round #320](https://mirror.codeforces.com/contests/578,579)).↵
↵
Good luck and have fun!↵
↵
**UPD**: Below is a message for you from [user:MikeMirzayanov,2020-04-02]:↵
↵
_About two weeks ago, we completed the crowdfunding campaign dedicated to the 10th anniversary of Codeforces. Community help inspires and provides resources for the development and operation of the platform. Thanks! With this round, we want to say thank you to Denis [user:aramis,2020-04-02] Shitov, for his significant contribution and support. It is valuable, important and very nice when people from the community lend a helping hand and congratulate. Thank you, Denis!_↵
↵
**UPD2**: Also thanks to [user:Shik,2020-04-03] for testing the round!↵
↵
**UPD3**: Score distribution:↵
↵
- Div2: 500 1000 1500 1750 2500↵
- Div1: 500 750 1500 2000 2500