The 2nd Universal Cup. Stage 4: Taipei

Hello Codeforces! The 4th Stage of the 2nd Universal Cup is coming. It will be held from Oct 7th to 8th.↵
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The contest has been used in the 45th Petrozavodsk Programming Camp and The Pafos Programming Camp 2023.↵
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Problem Setters: [user:olmrgcsi,2023-10-05], [user:2qbingxuan,2023-10-05], [user:ototot,2023-10-05]↵
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Testers: [user:baluteshih,2023-10-05], [user:icube,2023-10-05], [user:ltf0501,2023-10-05]↵
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In the 2nd Universal Cup, we have six time windows for participating. You can participate in the contest in the following six time windows:↵
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- Oct 6th 18:00 — Oct 6th 23:00 (UTC +8)↵
- Oct 7th 08:00 — Oct 7th 13:00 (UTC +8)↵
- Oct 7th 10:00 — Oct 8th 15:00 (UTC +8)↵
- Oct 7th 13:00 — Oct 7th 18:00 (UTC +8)↵
- Oct 7th 16:00 — Oct 7th 21:00 (UTC +8)↵
- Oct 7th 19:00 — Oct 8th 00:00 (UTC +8)↵
- Oct 7th 21:00 — Oct 8th 02:00 (UTC +8)↵
- Oct 7th 23:00 — Oct 8th 04:00 (UTC +8)↵
- Oct 8th 02:00 — Oct 8th 07:00 (UTC +8)↵
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Contest link: https://contest.ucup.ac↵
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Universal Cup Scoreboard: https://qoj.ac/ucup/scoreboard↵
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**About Universal Cup:**↵
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Universal Cup is a non-profit organization dedicated to providing trainings for competitive programming teams. Up to now, there are more than 700 teams from all over the world registering for Universal Cup.↵
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A more detailed introduction: https://codeforces.com/blog/entry/118679↵
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Register a new team: https://ucup.ac/register (the registration request will be processed before each stage)↵
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Results of the past stages: https://ucup.ac/results↵
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Terms: https://ucup.ac/terms↵
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Ratings: https://ucup.ac/rating↵
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