| 2241E | Fair and Square | | | 1600 | 5.8k |
| 2238F | Infinite Work | | | 2600 | 406 |
| 2229E | Deconstruction Tree | | | 2100 | 2k |
| 2222G | Statistics on Tree | | | 3100 | 215 |
| 2215C | Oriented Journey | | | 2200 | 819 |
| 2208D1 | Tree Orientation (Easy Version) | | | 1800 | 4.8k |
| 2208D2 | Tree Orientation (Hard Version) | | | 2200 | 2.1k |
| 2195G | Idiot First Search and Queries | | | 2300 | 1.2k |
| 2193H | Remove the Grail Tree | | | 2400 | 1.1k |
| 2187C | Jerry and Tom | | | 2300 | 1.5k |
| 2184F | Cherry Tree | | | 1900 | 4.2k |
| 2179F | Blackslex and Another RGB Walking | | | 2000 | 2.9k |
| 2164F2 | Chain Prefix Rank (Hard Version) | | | 2900 | 648 |
| 2164G | Pointless Machine | | | 3300 | 249 |
| 2161F | SubMST | | | 3000 | 368 |
| 2155F | Juan's Colorful Tree | | | 2800 | 745 |
| 2154D | Catshock | | | 1900 | 5k |
| 2150F | Cycle Closing | | | 3000 | 224 |
| 2138C1 | Maple and Tree Beauty (Easy Version) | | | 1800 | 5.7k |
| 2131D | Arboris Contractio | | | 1400 | 14.9k |
| 2127D | Root was Built by Love, Broken by Destiny | | | 1800 | 7.5k |
| 2127H | 23 Rises Again | | | 3100 | 1.9k |
| 2126F | 1-1-1, Free Tree! | | | 2000 | 4.4k |
| 2118F | Shifts and Swaps | | | 3100 | 299 |
| 2115B | Gellyfish and Camellia Japonica | | | 2100 | 5k |
| 2113E | From Kazan with Love | | | 2800 | 430 |
| 2112D | Reachability and Tree | | | 1700 | 9.8k |
| 2112E | Tree Colorings | | | 2200 | 3.5k |
| 2108E | Spruce Dispute | | | 2600 | 922 |
| 2104G | Modulo 3 | | | 2700 | 553 |
| 2097B | Baggage Claim | | | 2300 | 2k |
| 2081D | MST in Modulo Graph | | | 2600 | 1.2k |
| 2065F | Skibidus and Slay | | | 1700 | 7.3k |
| 2063C | Remove Exactly Two | | | 1600 | 15.1k |
| 2063F1 | Counting Is Not Fun (Easy Version) | | | 2400 | 1.6k |
| 2063F2 | Counting Is Not Fun (Hard Version) | | | 2700 | 951 |
| 2062D | Balanced Tree | | | 2200 | 3.6k |
| 2062E1 | The Game (Easy Version) | | | 2000 | 4.4k |
| 2062E2 | The Game (Hard Version) | | | 3000 | 464 |
| 2053E | Resourceful Caterpillar Sequence | | | 1900 | 4.6k |
| 2052M | Managing Cluster | | | 2700 | 403 |
| 2044G1 | Medium Demon Problem (easy version) | | | 1700 | 7.6k |
| 2044G2 | Medium Demon Problem (hard version) | | | 1900 | 4k |
| 2040E | Control of Randomness | | | 2100 | 2.8k |
| 2032D | Genokraken | | | 1800 | 6.3k |
| 2029D | Cool Graph | | | 1900 | 4k |
| 2025F | Choose Your Queries | | | 2700 | 1.1k |
| 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 |
| 2006A | Iris and Game on the Tree | | | 1700 | 9.8k |
| 2002D1 | DFS Checker (Easy Version) | | | 1900 | 5.2k |
| 2002D2 | DFS Checker (Hard Version) | | | 2300 | 2.9k |
| 1994D | Funny Game | | | 1900 | 7.7k |
| 1994F | Stardew Valley | | | 2500 | 1.6k |
| 1986F | Non-academic Problem | | | 1900 | 6.7k |
| 1980G | Yasya and the Mysterious Tree | | | 2300 | 1.8k |
| 1970G2 | Min-Fund Prison (Medium) | | | 2200 | 907 |
| 1970G3 | Min-Fund Prison (Hard) | | | 2400 | 574 |
| 1949J | Amanda the Amoeba | | | 2600 | 550 |
| 1940C | Burenka and Pether | | | unrated | 44 |
| 1939B | Evidence Board | | | unrated | 308 |
| 1929E | Sasha and the Happy Tree Cutting | | | 2300 | 2.1k |
| 1927F | Microcycle | | | 1900 | 5.6k |
| 1926G | Vlad and Trouble at MIT | | | 1900 | 4.7k |
| 1923E | Count Paths | | | 2000 | 5.3k |
| 1920F2 | Smooth Sailing (Hard Version) | | | 3000 | 668 |
| 1918F | Caterpillar on a Tree | | | 2500 | 1.2k |
| 1914G1 | Light Bulbs (Easy Version) | | | 2100 | 2.5k |
| 1904E | Tree Queries | | | 2500 | 1.4k |
| 1904F | Beautiful Tree | | | 2800 | 581 |
| 1903F | Babysitting | | | 2500 | 976 |
| 1902F | Trees and XOR Queries Again | | | 2400 | 1.5k |
| 1901E | Compressed Tree | | | 2200 | 2k |
| 1899F | Alex's whims | | | 1600 | 9.7k |
| 1889D | Game of Stacks | | | 3000 | 982 |
| 1889E | Doremy's Swapping Trees | | | 3500 | 184 |
| 1881F | Minimum Maximum Distance | | | 1700 | 9.8k |
| 1879E | Interactive Game with Coloring | | | 2400 | 1.6k |
| 1873H | Mad City | | | 1700 | 9.7k |
| 1870H | Standard Graph Problem | | | 3500 | 127 |
| 1868D | Flower-like Pseudotree | | | 3000 | 418 |
| 1866K | Keen Tree Calculation | | | 2500 | 585 |
| 1859F | Teleportation in Byteland | | | 3200 | 582 |
| 1857G | Counting Graphs | | | 2000 | 5.6k |
| 1851G | Vlad and the Mountains | | | 2000 | 4.2k |
| 1843F1 | Omsk Metro (simple version) | | | 1800 | 6.5k |
| 1830A | Copil Copac Draws Trees | | | 1400 | 21.3k |
| 1823F | Random Walk | | | 2600 | 1.4k |
| 1822F | Gardening Friends | | | 1700 | 7.8k |
| 1815B | Sum Graph | | | 2000 | 3.7k |
| 1805D | A Wide, Wide Graph | | | 1800 | 9.6k |
| 1790F | Timofey and Black-White Tree | | | 2100 | 4.2k |
| 1788F | XOR, Tree, and Queries | | | 2500 | 1.2k |
| 1778F | Maximizing Root | | | 2600 | 964 |
| 1777E | Edge Reverse | | | 2200 | 2.4k |
| 1767E | Algebra Flash | | | 2500 | 1.3k |
| 1763F | Edge Queries | | | 3000 | 750 |
| 1761E | Make It Connected | | | 2400 | 2.2k |