| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 2556 | P251B Playing with Permutations | 0 / 0 | (None) | |
| 2558 | P251E Tree and Table | 0 / 0 | (None) | |
| 2559 | P252A Little Xor | 0 / 0 | (None) | |
| 2565 | P254E Dormitory | 0 / 0 | (None) | |
| 2566 | P255B Code Parsing | 0 / 0 | (None) | |
| 2567 | P255D Mr | 0 / 0 | (None) | |
| 2569 | P257A Sockets | 0 / 0 | (None) | |
| 2570 | P257B Playing Cubes | 0 / 0 | (None) | |
| 2576 | P259B Little Elephant and Magic Square | 0 / 0 | (None) | |
| 2577 | P260B Ancient Prophesy | 0 / 0 | (None) | |
| 2582 | P262A Roma and Lucky Numbers | 0 / 0 | (None) | |
| 2584 | P263A Beautiful Matrix | 0 / 2 | 10 | |
| 2585 | P263C Circle of Numbers | 0 / 0 | (None) | |
| 2587 | P264A Escape from Stones | 0 / 0 | (None) | |
| 2590 | P265B Roadside Trees (Simplified Edition) | 0 / 0 | (None) | |
| 2591 | P266B Queue at the School | 0 / 0 | (None) | |
| 2596 | P268B Buttons | 0 / 0 | (None) | |
| 2601 | P270B Multithreading | 0 / 0 | (None) | |
| 2606 | P272A Dima and Friends | 0 / 0 | (None) | |
| 2607 | P272C Dima and Staircase | 0 / 0 | (None) |
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