| 1970C3 | Game on Tree (Hard) | | | 1900 | 2.5k |
| 1970G1 | Min-Fund Prison (Easy) | | | 1900 | 2k |
| 1970G2 | Min-Fund Prison (Medium) | | | 2200 | 907 |
| 1970G3 | Min-Fund Prison (Hard) | | | 2400 | 574 |
| 1957F2 | Frequency Mismatch (Hard Version) | | | 2700 | 659 |
| 1949C | Annual Ants' Gathering | | | 1900 | 2.6k |
| 1943C | Tree Compass | | | 2300 | 2.7k |
| 1940C | Burenka and Pether | | | unrated | 44 |
| 1939B | Evidence Board | | | unrated | 308 |
| 1935F | Andrey's Tree | | | 2800 | 634 |
| 1930H | Interactive Mex Tree | | | 3300 | 379 |
| 1929E | Sasha and the Happy Tree Cutting | | | 2300 | 2.1k |
| 1929F | Sasha and the Wedding Binary Search Tree | | | 2300 | 2.4k |
| 1927F | Microcycle | | | 1900 | 5.6k |
| 1926G | Vlad and Trouble at MIT | | | 1900 | 4.7k |
| 1923E | Count Paths | | | 2000 | 5.3k |
| 1918F | Caterpillar on a Tree | | | 2500 | 1.2k |
| 1916E | Happy Life in University | | | 2300 | 2.7k |
| 1914F | Programming Competition | | | 1900 | 5.1k |
| 1914G1 | Light Bulbs (Easy Version) | | | 2100 | 2.5k |
| 1905E | One-X | | | 2400 | 1.3k |
| 1904E | Tree Queries | | | 2500 | 1.4k |
| 1904F | Beautiful Tree | | | 2800 | 581 |
| 1902F | Trees and XOR Queries Again | | | 2400 | 1.5k |
| 1901E | Compressed Tree | | | 2200 | 2k |
| 1900C | Anji's Binary Tree | | | 1300 | 15.3k |
| 1899G | Unusual Entertainment | | | 1900 | 4.1k |
| 1891F | A Growing Tree | | | 2000 | 4.9k |
| 1889D | Game of Stacks | | | 3000 | 982 |
| 1889E | Doremy's Swapping Trees | | | 3500 | 184 |
| 1882D | Tree XOR | | | 1900 | 7.3k |
| 1881F | Minimum Maximum Distance | | | 1700 | 9.8k |
| 1879E | Interactive Game with Coloring | | | 2400 | 1.6k |
| 1878G | wxhtzdy ORO Tree | | | 2300 | 1.5k |
| 1873H | Mad City | | | 1700 | 9.7k |
| 1861C | Queries for the Array | | | 1600 | 12.5k |
| 1859F | Teleportation in Byteland | | | 3200 | 582 |
| 1858E1 | Rollbacks (Easy Version) | | | 2500 | 1.7k |
| 1856E1 | PermuTree (easy version) | | | 1800 | 6.6k |
| 1856E2 | PermuTree (hard version) | | | 2700 | 1.8k |
| 1844G | Tree Weights | | | 3000 | 1.2k |
| 1843D | Apple Tree | | | 1200 | 22.3k |
| 1843F1 | Omsk Metro (simple version) | | | 1800 | 6.5k |
| 1843F2 | Omsk Metro (hard version) | | | 2300 | 2.2k |
| 1842F | Tenzing and Tree | | | 2500 | 1.9k |
| 1833G | Ksyusha and Chinchilla | | | 1800 | 6.5k |
| 1830A | Copil Copac Draws Trees | | | 1400 | 21.3k |
| 1827D | Two Centroids | | | 2800 | 1k |
| 1827E | Bus Routes | | | 3400 | 1k |
| 1824B2 | LuoTianyi and the Floating Islands (Hard Version) | | | 2300 | 3.6k |
| 1824C | LuoTianyi and XOR-Tree | | | 2500 | 1.7k |
| 1822F | Gardening Friends | | | 1700 | 7.8k |
| 1806E | Tree Master | | | 2200 | 3.5k |
| 1805D | A Wide, Wide Graph | | | 1800 | 9.6k |
| 1805E | There Should Be a Lot of Maximums | | | 2300 | 2k |
| 1800G | Symmetree | | | 2200 | 2.6k |
| 1797D | Li Hua and Tree | | | 1900 | 4.7k |
| 1797F | Li Hua and Path | | | 3000 | 666 |
| 1796E | Colored Subgraphs | | | 2500 | 1.1k |
| 1795F | Blocking Chips | | | 2400 | 1.4k |
| 1790F | Timofey and Black-White Tree | | | 2100 | 4.2k |
| 1788F | XOR, Tree, and Queries | | | 2500 | 1.2k |
| 1778E | The Tree Has Fallen! | | | 2500 | 1.2k |
| 1778F | Maximizing Root | | | 2600 | 964 |
| 1777D | Score of a Tree | | | 1900 | 4.9k |
| 1777E | Edge Reverse | | | 2200 | 2.4k |
| 1774E | Two Chess Pieces | | | 1900 | 4k |
| 1771D | Hossam and (sub-)palindromic tree | | | 2100 | 3.3k |
| 1770E | Koxia and Tree | | | 2400 | 1.6k |
| 1764F | Doremy's Experimental Tree | | | 2500 | 1.3k |
| 1763F | Edge Queries | | | 3000 | 750 |
| 1749F | Distance to the Path | | | 2800 | 642 |
| 1746D | Paths on the Tree | | | 1900 | 5.2k |
| 1741D | Masha and a Beautiful Tree | | | 1300 | 18.7k |
| 1740E | Hanging Hearts | | | 1800 | 5.1k |
| 1739D | Reset K Edges | | | 1900 | 6.4k |
| 1738D | Permutation Addicts | | | 1900 | 3.8k |
| 1726D | Edge Split | | | 2000 | 4.2k |
| 1721E | Prefix Function Queries | | | 2200 | 2.7k |
| 1714G | Path Prefixes | | | 1700 | 9.9k |
| 1712F | Triameter | | | 3200 | 508 |
| 1709E | XOR Tree | | | 2400 | 4.2k |
| 1707C | DFS Trees | | | 2400 | 2k |
| 1707D | Partial Virtual Trees | | | 3000 | 997 |
| 1706E | Qpwoeirut and Vertices | | | 2300 | 4k |
| 1702G1 | Passable Paths (easy version) | | | 1900 | 6.5k |
| 1702G2 | Passable Paths (hard version) | | | 2000 | 6.1k |
| 1696F | Tree Recovery | | | 2600 | 1.2k |
| 1695D1 | Tree Queries (Easy Version) | | | 2200 | 2.5k |
| 1695D2 | Tree Queries (Hard Version) | | | 2300 | 2.3k |
| 1693B | Fake Plastic Trees | | | 1700 | 9.7k |
| 1691F | K-Set Tree | | | 2500 | 1.2k |
| 1689C | Infected Tree | | | 1600 | 13.9k |
| 1682E | Unordered Swaps | | | 2700 | 777 |
| 1681F | Unique Occurrences | | | 2300 | 2.4k |
| 1680F | Lenient Vertex Cover | | | 2600 | 979 |
| 1676G | White-Black Balanced Subtrees | | | 1300 | 25.6k |
| 1675F | Vlad and Unfinished Business | | | 1800 | 6.4k |
| 1670E | Hemose on the Tree | | | 2200 | 2k |
| 1667D | Edge Elimination | | | 2900 | 846 |