| 2241E | Fair and Square | | | 1600 | 5.8k |
| 2238F | Infinite Work | | | 2600 | 406 |
| 2231E | Graph Cutting | | | 2300 | 1.1k |
| 2223C | Zhily and Signpost | | | 2300 | 921 |
| 2219C | Coloring a Red Black Tree | | | 2300 | 1.4k |
| 2219D | MEX Replacement on Tree | | | 2700 | 533 |
| 2217G | Down the Pivot | | | 2600 | 444 |
| 2211E | Minimum Path Cover | | | 2500 | 1k |
| 2210D | A Simple RBS Problem | | | 2100 | 2.3k |
| 2210F | A Simple Problem | | | 2700 | 263 |
| 2200H | Six Seven | | | 2600 | 528 |
| 2178F | Conquer or of Forest | | | 2200 | 1.9k |
| 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 |
| 2162G | Beautiful Tree | | | 2200 | 2.9k |
| 2152G | Query Jungle | | | 2900 | 2.7k |
| 2135F | To the Infinity | | | 3500 | 381 |
| 2124H | Longest Good Subsequence | | | 3400 | 232 |
| 2124I | Lexicographic Partition | | | 3500 | 360 |
| 2122G | Tree Parking | | | 3300 | 1.4k |
| 2120C | Divine Tree | | | 1400 | 13k |
| 2112E | Tree Colorings | | | 2200 | 3.5k |
| 2107E | Ain and Apple Tree | | | 2600 | 957 |
| 2097B | Baggage Claim | | | 2300 | 2k |
| 2081D | MST in Modulo Graph | | | 2600 | 1.2k |
| 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 |
| 2006B | Iris and the Tree | | | 1800 | 4.4k |
| 2001E1 | Deterministic Heap (Easy Version) | | | 2400 | 1.6k |
| 1994D | Funny Game | | | 1900 | 7.7k |
| 1994E | Wooden Game | | | 2000 | 5.7k |
| 1976E | Splittable Permutations | | | 2500 | 1.3k |
| 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 |
| 1929F | Sasha and the Wedding Binary Search Tree | | | 2300 | 2.4k |
| 1914G1 | Light Bulbs (Easy Version) | | | 2100 | 2.5k |
| 1905E | One-X | | | 2400 | 1.3k |
| 1902F | Trees and XOR Queries Again | | | 2400 | 1.5k |
| 1895D | XOR Construction | | | 1900 | 7.2k |
| 1887D | Split | | | 2700 | 1.3k |
| 1868C | Travel Plan | | | 2400 | 1.4k |
| 1864E | Guess Game | | | 2100 | 3.1k |
| 1857D | Strong Vertices | | | 1300 | 31k |
| 1856E2 | PermuTree (hard version) | | | 2700 | 1.8k |
| 1851F | Lisa and the Martians | | | 1800 | 7.8k |
| 1844G | Tree Weights | | | 3000 | 1.2k |
| 1843C | Sum in Binary Tree | | | 800 | 40.3k |
| 1843D | Apple Tree | | | 1200 | 22.3k |
| 1843F1 | Omsk Metro (simple version) | | | 1800 | 6.5k |
| 1843F2 | Omsk Metro (hard version) | | | 2300 | 2.2k |
| 1824B1 | LuoTianyi and the Floating Islands (Easy Version) | | | 1800 | 6.3k |
| 1824B2 | LuoTianyi and the Floating Islands (Hard Version) | | | 2300 | 3.6k |
| 1823F | Random Walk | | | 2600 | 1.4k |
| 1819C | The Fox and the Complete Tree Traversal | | | 2400 | 1.8k |
| 1819E | Roads in E City | | | 3200 | 384 |
| 1810F | M-tree | | | 2800 | 701 |
| 1790F | Timofey and Black-White Tree | | | 2100 | 4.2k |
| 1781F | Bracket Insertion | | | 2700 | 1.4k |
| 1778E | The Tree Has Fallen! | | | 2500 | 1.2k |
| 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 |
| 1762E | Tree Sum | | | 2600 | 899 |
| 1748E | Yet Another Array Counting Problem | | | 2300 | 2.8k |
| 1725E | Electrical Efficiency | | | 2500 | 640 |
| 1718D | Permutation for Burenka | | | 3300 | 449 |
| 1709F | Multiset of Strings | | | 2500 | 729 |
| 1707D | Partial Virtual Trees | | | 3000 | 997 |
| 1691F | K-Set Tree | | | 2500 | 1.2k |
| 1682E | Unordered Swaps | | | 2700 | 777 |
| 1661E | Narrow Components | | | 2500 | 1.2k |
| 1656E | Equal Tree Sums | | | 2200 | 3.9k |
| 1654D | Potion Brewing Class | | | 2100 | 3.1k |
| 1633E | Spanning Tree Queries | | | 2400 | 1.8k |
| 1625D | Binary Spiders | | | 2300 | 2.4k |
| 1617E | Christmas Chocolates | | | 2700 | 1.1k |
| 1615E | Purple Crayon | | | 2400 | 1.8k |
| 1594E2 | Rubik's Cube Coloring (hard version) | | | 2300 | 1.7k |
| 1592D | Hemose in ICPC ? | | | 2300 | 2.7k |
| 1540B | Tree Array | | | 2300 | 3.1k |
| 1527D | MEX Tree | | | 2400 | 2.3k |
| 1498F | Christmas Game | | | 2500 | 1.1k |
| 1495D | BFS Trees | | | 2600 | 1.6k |
| 1416C | XOR Inverse | | | 2000 | 5.2k |
| 1401D | Maximum Distributed Tree | | | 1800 | 10.7k |
| 1388C | Uncle Bogdan and Country Happiness | | | 1800 | 10.5k |
| 1379E | Inverse Genealogy | | | 2800 | 538 |
| 1369D | TediousLee | | | 1900 | 9.3k |