Hello, Codeforces!↵
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I'm glad to invite you to [contest:1545] and [contest:1546], which will be held on [contest_time:1545]. **Note the unusual start time of the round.**↵
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The round will be rated for both divisions. Each division will have **6 problems** and **2.5 hours** to solve them. There may or may not be an interactive problem, so I suggest you should read the [guide for interactive problems](https://mirror.codeforces.com/blog/entry/45307).↵
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All problems were written and prepared by [user:CoupDeGrace,2021-07-02], [user:kuangbin,2021-07-02], [user:mejiamejia,2021-07-02], [user:Heltion,2021-07-02], [user:Melacau,2021-07-02], [user:Nanako,2021-07-02], [user:GOATWU,2021-07-02], [user:Cirno_9baka,2021-07-02], [user:Suiseiseki,2021-07-02], [user:ODT,2021-07-02], [user:box,2021-07-03], [user:Ynoi,2021-07-02], [user:syh0313,2021-07-02], [user:wh0816,2021-07-02] and me. ↵
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And thanks to [user:QAQAutoMaton,2021-07-02], [user:gamegame,2021-07-02], [user:starusc,2021-07-02], [user:interestingLSY,2021-07-02], [user:chenkuowen,2021-07-02], [user:DataStructures,2021-07-02], [user:1-gon,2021-07-02], [user:ijxjdjd,2021-07-02], [user:Schwarzenegger,2021-07-02], [user:sunsiyu,2021-07-02], [user:Nezzar,2021-07-02], [user:senyaa,2021-07-02], [user:TheOneYouWant,2021-07-02], [user:gyz_gyz,2021-07-02], [user:kimoyami,2021-07-02], [user:njupt_lyy,2021-07-02], [user:221,2021-07-02], [user:growup974,2021-07-02], [user:Manik,2021-07-02], [user:absi2011,2021-07-04], [user:gyh20,2021-07-04], [user:errorgorn,2021-07-04], [user:antontrygubO_o,2021-07-04], [user:oolimry,2021-07-04], [user:zhangzx123,2021-07-04], [user:m371,2021-07-04], [user:Proszek_na_ludka,2021-07-04], [user:SonDinh,2021-07-04], ↵
[user:triple__a,2021-07-04], [user:Pecco,2021-07-04], [user:AzusaCat,2021-07-04], [user:dorijanlendvaj,2021-07-04], ↵
[user:Imakf,2021-07-04], [user:Forever_Pursuit,2021-07-04] for testing and good advice, [user:isaf27,2021-07-06] for his excellent round coordination and help with preparation and [user:MikeMirzayanov,2019-05-10] for great systems Codeforces and Polygon.And you, for participating!↵
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This is my first round ever. Great efforts have been put in during the past six months. We are sincerely looking forward to your participation. We hope everyone will enjoy it.↵
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Good luck!↵
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↵
↵
**UPD1**: Here's the score distribution:↵
↵
Div 1: 500 — 1000 — 1500 — 2250 -(2000+2000) — 4000↵
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Div 2: 500 — 1000 — 1250 — 1750 — 2250 — 3000
↵
I'm glad to invite you to [contest:1545] and [contest:1546], which will be held on [contest_time:1545]. **Note the unusual start time of the round.**↵
↵
The round will be rated for both divisions. Each division will have **6 problems** and **2.5 hours** to solve them. There may or may not be an interactive problem, so I suggest you should read the [guide for interactive problems](https://mirror.codeforces.com/blog/entry/45307).↵
↵
All problems were written and prepared by [user:CoupDeGrace,2021-07-02], [user:kuangbin,2021-07-02], [user:mejiamejia,2021-07-02], [user:Heltion,2021-07-02], [user:Melacau,2021-07-02], [user:Nanako,2021-07-02], [user:GOATWU,2021-07-02], [user:Cirno_9baka,2021-07-02], [user:Suiseiseki,2021-07-02], [user:ODT,2021-07-02], [user:box,2021-07-03], [user:Ynoi,2021-07-02], [user:syh0313,2021-07-02], [user:wh0816,2021-07-02] and me. ↵
↵
And thanks to [user:QAQAutoMaton,2021-07-02], [user:gamegame,2021-07-02], [user:starusc,2021-07-02], [user:interestingLSY,2021-07-02], [user:chenkuowen,2021-07-02], [user:DataStructures,2021-07-02], [user:1-gon,2021-07-02], [user:ijxjdjd,2021-07-02], [user:Schwarzenegger,2021-07-02], [user:sunsiyu,2021-07-02], [user:Nezzar,2021-07-02], [user:senyaa,2021-07-02], [user:TheOneYouWant,2021-07-02], [user:gyz_gyz,2021-07-02], [user:kimoyami,2021-07-02], [user:njupt_lyy,2021-07-02], [user:221,2021-07-02], [user:growup974,2021-07-02], [user:Manik,2021-07-02], [user:absi2011,2021-07-04], [user:gyh20,2021-07-04], [user:errorgorn,2021-07-04], [user:antontrygubO_o,2021-07-04], [user:oolimry,2021-07-04], [user:zhangzx123,2021-07-04], [user:m371,2021-07-04], [user:Proszek_na_ludka,2021-07-04], [user:SonDinh,2021-07-04], ↵
[user:triple__a,2021-07-04], [user:Pecco,2021-07-04], [user:AzusaCat,2021-07-04], [user:dorijanlendvaj,2021-07-04], ↵
[user:Imakf,2021-07-04], [user:Forever_Pursuit,2021-07-04] for testing and good advice, [user:isaf27,2021-07-06] for his excellent round coordination and help with preparation and [user:MikeMirzayanov,2019-05-10] for great systems Codeforces and Polygon.And you, for participating!↵
↵
This is my first round ever. Great efforts have been put in during the past six months. We are sincerely looking forward to your participation. We hope everyone will enjoy it.↵
↵
Good luck!↵
↵
↵
↵
**UPD1**: Here's the score distribution:↵
↵
Div 1: 500 — 1000 — 1500 — 2250 -(2000+2000) — 4000↵
↵
Div 2: 500 — 1000 — 1250 — 1750 — 2250 — 3000
