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_cooper_'s Competition History
| Date | Contest | Rank | Performance | New Rating | Diff | |
|---|---|---|---|---|---|---|
| AtCoder Beginner Contest 313 | 8771 | - | - | - | ||
| HHKB Programming Contest 2025(AtCoder Beginner Contest 388) | 10014 | 38 |  2 |
- | ||
| AtCoder Beginner Contest 401 | 10950 | 86 | 9 |
+7 | ||
| Tokio Marine & Nichido Fire Insurance Programming Contest 2025 (AtCoder Beginner Contest 402) | 10334 | - | - | - | ||
| AtCoder Beginner Contest 404 | 9001 | - | - | - | ||
| AtCoder Regular Contest 197 (Div. 2) | 1452 | - | - | - | ||
| AtCoder Beginner Contest 405 | 11522 | - | - | - | ||
| AtCoder Beginner Contest 410 | 9269 | 155 | 23 |
+14 | ||
| Mirrativ Programming Contest 2025 (AtCoder Beginner Contest 414) | 8289 | 217 | 41 |
+18 | ||
| AtCoder Beginner Contest 421 | 9994 | - | - | - | ||
| AtCoder Beginner Contest 428 | 9095 | 62 | 43 |
+2 |