Since CEOI 2025 is over and the tasks and test data have been published, can we discuss the solutions here?
Here are the tasks.
→ Pay attention
→ Top rated
| # | User | Rating |
|---|---|---|
| 1 | Benq | 3676 |
| 2 | Kevin114514 | 3659 |
| 3 | jiangly | 3640 |
| 4 | turmax | 3450 |
| 5 | tourist | 3408 |
| 6 | strapple | 3360 |
| 7 | Um_nik | 3354 |
| 8 | squareOf105 | 3348 |
| 9 | maroonrk | 3312 |
| 10 | idontwannadothis…e | 3191 |
→ Top contributors
| # | User | Contrib. |
|---|---|---|
| 1 | Qingyu | 154 |
| 2 | nik_exists | 151 |
| 3 | maspy | 149 |
| 4 | AmShZ | 146 |
| 5 | Um_nik | 143 |
| 6 | Errichto | 139 |
| 7 | BledDest | 136 |
| 8 | adamant | 135 |
| 9 | maroonrk | 133 |
| 10 | cry | 130 |
→ Find user
→ Recent actions
History
Revisions
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en8 |
|
dinohaur | 2026-07-01 11:00:14 | 359 | Tiny change: 'exity $O((Q+N) log N)$.\n\n---' -> 'exity $O((q+n) log n)$.\n\n---' | |
| en7 |
|
dinohaur | 2026-07-01 01:52:04 | 93 | ||
| en6 |
|
dinohaur | 2026-07-01 01:48:20 | 81 | ||
| en5 |
|
dinohaur | 2026-07-01 01:43:18 | 6695 | Tiny change: 'P(x) + 1$.' -> 'P(x) + 1$.\n\n---\n\nThat's all folks! :)' | |
| en4 |
|
dinohaur | 2025-08-12 15:03:47 | 70 | ||
| en3 |
|
dinohaur | 2025-07-14 16:00:57 | 107 | ||
| en2 |
|
dinohaur | 2025-07-12 13:54:49 | 65 | ||
| en1 |
|
dinohaur | 2025-07-12 13:41:04 | 127 | Initial revision (published) |
Codeforces (c) Copyright 2010-2026 Mike Mirzayanov
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