| 2241E | Fair and Square | | | 1600 | 5.8k |
| 2238F | Infinite Work | | | 2600 | 406 |
| 2229E | Deconstruction Tree | | | 2100 | 2k |
| 2217G | Down the Pivot | | | 2600 | 444 |
| 2190D | Prufer Vertex | | | 2500 | 1k |
| 2183D2 | Tree Coloring (Hard Version) | | | 2100 | 2.6k |
| 2183F | Jumping Man | | | 2500 | 1.2k |
| 2182G | Short Garland | | | 2800 | 383 |
| 2178F | Conquer or of Forest | | | 2200 | 1.9k |
| 2174F | Mosaic Tree | | | 2800 | 508 |
| 2164F1 | Chain Prefix Rank (Easy Version) | | | 2600 | 1.3k |
| 2164F2 | Chain Prefix Rank (Hard Version) | | | 2900 | 648 |
| 2161F | SubMST | | | 3000 | 368 |
| 2127D | Root was Built by Love, Broken by Destiny | | | 1800 | 7.5k |
| 2122G | Tree Parking | | | 3300 | 1.4k |
| 2117F | Wildflower | | | 1800 | 6.1k |
| 2112E | Tree Colorings | | | 2200 | 3.5k |
| 2101F | Shoo Shatters the Sunshine | | | 3300 | 168 |
| 2097B | Baggage Claim | | | 2300 | 2k |
| 2071E | LeaFall | | | 2600 | 840 |
| 2063F1 | Counting Is Not Fun (Easy Version) | | | 2400 | 1.6k |
| 2063F2 | Counting Is Not Fun (Hard Version) | | | 2700 | 951 |
| 2040E | Control of Randomness | | | 2100 | 2.8k |
| 2028E | Alice's Adventures in the Rabbit Hole | | | 2300 | 2k |
| 2001E1 | Deterministic Heap (Easy Version) | | | 2400 | 1.6k |
| 2001E2 | Deterministic Heap (Hard Version) | | | 2900 | 302 |
| 1976E | Splittable Permutations | | | 2500 | 1.3k |
| 1967C | Fenwick Tree | | | 2300 | 2.3k |
| 1929D | Sasha and a Walk in the City | | | 1900 | 5.9k |
| 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 |
| 1868C | Travel Plan | | | 2400 | 1.4k |
| 1857G | Counting Graphs | | | 2000 | 5.6k |
| 1843C | Sum in Binary Tree | | | 800 | 40.3k |
| 1843D | Apple Tree | | | 1200 | 22.3k |
| 1837E | Playoff Fixing | | | 2200 | 2.6k |
| 1824B1 | LuoTianyi and the Floating Islands (Easy Version) | | | 1800 | 6.3k |
| 1824B2 | LuoTianyi and the Floating Islands (Hard Version) | | | 2300 | 3.6k |
| 1781F | Bracket Insertion | | | 2700 | 1.4k |
| 1777D | Score of a Tree | | | 1900 | 4.9k |
| 1774G | Segment Covering | | | 3200 | 692 |
| 1770E | Koxia and Tree | | | 2400 | 1.6k |
| 1762E | Tree Sum | | | 2600 | 899 |
| 1725E | Electrical Efficiency | | | 2500 | 640 |
| 1725I | Imitating the Key Tree | | | 2800 | 333 |
| 1707D | Partial Virtual Trees | | | 3000 | 997 |
| 1698E | PermutationForces II | | | 2300 | 1.9k |
| 1691F | K-Set Tree | | | 2500 | 1.2k |
| 1671E | Preorder | | | 2100 | 3.3k |
| 1580B | Mathematics Curriculum | | | 2600 | 1.4k |
| 1551F | Equidistant Vertices | | | 2200 | 2.2k |
| 1540B | Tree Array | | | 2300 | 3.1k |
| 1528E | Mashtali and Hagh Trees | | | 2900 | 640 |
| 1527D | MEX Tree | | | 2400 | 2.3k |
| 1517F | Reunion | | | 3200 | 702 |
| 1499F | Diameter Cuts | | | 2400 | 1.7k |
| 1495D | BFS Trees | | | 2600 | 1.6k |
| 1486F | Pairs of Paths | | | 2600 | 875 |
| 1454E | Number of Simple Paths | | | 2000 | 6.8k |
| 1408G | Clusterization Counting | | | 2700 | 1.4k |
| 1402C | Star Trek | | | 2600 | 271 |
| 1299D | Around the World | | | 3000 | 652 |
| 1292C | Xenon's Attack on the Gangs | | | 2300 | 2.4k |
| 1254E | Send Tree to Charlie | | | 3300 | 459 |
| 1172B | Nauuo and Circle | | | 1900 | 4.4k |
| 1118F2 | Tree Cutting (Hard Version) | | | 2700 | 688 |
| 1109D | Sasha and Interesting Fact from Graph Theory | | | 2400 | 1.5k |
| 1097G | Vladislav and a Great Legend | | | 3000 | 1.2k |
| 1034C | Region Separation | | | 2700 | 1.1k |
| 997D | Cycles in product | | | 2900 | 855 |
| 995F | Cowmpany Cowmpensation | | | 2700 | 1.8k |
| 960E | Alternating Tree | | | 2300 | 2.4k |
| 914H | Ember and Storm's Tree Game | | | 3400 | 322 |
| 859E | Desk Disorder | | | 2100 | 2.2k |
| 830D | Singer House | | | 2800 | 1k |
| 762F | Tree nesting | | | 2800 | 513 |
| 724F | Uniformly Branched Trees | | | 2700 | 561 |
| 629E | Famil Door and Roads | | | 2300 | 1.2k |
| 500D | New Year Santa Network | | | 1900 | 3.3k |
| 482D | Random Function and Tree | | | 2700 | 646 |
| 288D | Polo the Penguin and Trees | | | 2400 | 858 |