| 2241E | Fair and Square | | | 1600 | 5.8k |
| 2231E | Graph Cutting | | | 2300 | 1.1k |
| 2219C | Coloring a Red Black Tree | | | 2300 | 1.4k |
| 2217G | Down the Pivot | | | 2600 | 444 |
| 2211E | Minimum Path Cover | | | 2500 | 1k |
| 2174F | Mosaic Tree | | | 2800 | 508 |
| 2167F | Tree, TREE!!! | | | 1600 | 7.6k |
| 2164F1 | Chain Prefix Rank (Easy Version) | | | 2600 | 1.3k |
| 2164F2 | Chain Prefix Rank (Hard Version) | | | 2900 | 648 |
| 2124H | Longest Good Subsequence | | | 3400 | 232 |
| 2112E | Tree Colorings | | | 2200 | 3.5k |
| 2097B | Baggage Claim | | | 2300 | 2k |
| 2063F1 | Counting Is Not Fun (Easy Version) | | | 2400 | 1.6k |
| 2052M | Managing Cluster | | | 2700 | 403 |
| 2048F | Kevin and Math Class | | | 2500 | 1.3k |
| 2040E | Control of Randomness | | | 2100 | 2.8k |
| 2031E | Penchick and Chloe's Trees | | | 2100 | 2.8k |
| 2028E | Alice's Adventures in the Rabbit Hole | | | 2300 | 2k |
| 2021E1 | Digital Village (Easy Version) | | | 2300 | 2k |
| 2021E2 | Digital Village (Hard Version) | | | 2500 | 1.3k |
| 2021E3 | Digital Village (Extreme Version) | | | 2800 | 725 |
| 2020D | Connect the Dots | | | 1800 | 7.6k |
| 2001E1 | Deterministic Heap (Easy Version) | | | 2400 | 1.6k |
| 1967C | Fenwick Tree | | | 2300 | 2.3k |
| 1929D | Sasha and a Walk in the City | | | 1900 | 5.9k |
| 1929E | Sasha and the Happy Tree Cutting | | | 2300 | 2.1k |
| 1914G1 | Light Bulbs (Easy Version) | | | 2100 | 2.5k |
| 1905E | One-X | | | 2400 | 1.3k |
| 1868C | Travel Plan | | | 2400 | 1.4k |
| 1856E2 | PermuTree (hard version) | | | 2700 | 1.8k |
| 1843D | Apple Tree | | | 1200 | 22.3k |
| 1843F1 | Omsk Metro (simple version) | | | 1800 | 6.5k |
| 1843F2 | Omsk Metro (hard version) | | | 2300 | 2.2k |
| 1823F | Random Walk | | | 2600 | 1.4k |
| 1819C | The Fox and the Complete Tree Traversal | | | 2400 | 1.8k |
| 1781F | Bracket Insertion | | | 2700 | 1.4k |
| 1778F | Maximizing Root | | | 2600 | 964 |
| 1777D | Score of a Tree | | | 1900 | 4.9k |
| 1770E | Koxia and Tree | | | 2400 | 1.6k |
| 1767E | Algebra Flash | | | 2500 | 1.3k |
| 1748E | Yet Another Array Counting Problem | | | 2300 | 2.8k |
| 1725E | Electrical Efficiency | | | 2500 | 640 |
| 1709F | Multiset of Strings | | | 2500 | 729 |
| 1707D | Partial Virtual Trees | | | 3000 | 997 |
| 1691F | K-Set Tree | | | 2500 | 1.2k |
| 1661E | Narrow Components | | | 2500 | 1.2k |
| 1617E | Christmas Chocolates | | | 2700 | 1.1k |
| 1594E2 | Rubik's Cube Coloring (hard version) | | | 2300 | 1.7k |
| 1540B | Tree Array | | | 2300 | 3.1k |
| 1498F | Christmas Game | | | 2500 | 1.1k |
| 1416C | XOR Inverse | | | 2000 | 5.2k |
| 1401D | Maximum Distributed Tree | | | 1800 | 10.7k |
| 1379E | Inverse Genealogy | | | 2800 | 538 |
| 1369D | TediousLee | | | 1900 | 9.3k |
| 1338D | Nested Rubber Bands | | | 2700 | 1.2k |
| 1299D | Around the World | | | 3000 | 652 |
| 1292D | Chaotic V. | | | 2700 | 1.1k |
| 1142B | Lynyrd Skynyrd | | | 2000 | 4k |
| 1109D | Sasha and Interesting Fact from Graph Theory | | | 2400 | 1.5k |
| 1088E | Ehab and a component choosing problem | | | 2400 | 1.6k |
| 1067E | Random Forest Rank | | | 2800 | 591 |
| 1025D | Recovering BST | | | 2100 | 4.3k |
| 995F | Cowmpany Cowmpensation | | | 2700 | 1.8k |
| 979D | Kuro and GCD and XOR and SUM | | | 2200 | 2.3k |
| 917D | Stranger Trees | | | 2600 | 1.5k |
| 830E | Perpetual Motion Machine | | | 3100 | 373 |
| 802J3 | Send the Fool Further! (hard) | | | 2400 | 404 |
| 766E | Mahmoud and a xor trip | | | 2100 | 3.6k |
| 643E | Bear and Destroying Subtrees | | | 2700 | 756 |
| 538E | Demiurges Play Again | | | 2200 | 1.7k |
| 486D | Valid Sets | | | 2100 | 4.4k |
| 75D | Big Maximum Sum | | | 2000 | 2.1k |