| 1914F | Programming Competition | | | 1900 | 5.1k |
| 1914G1 | Light Bulbs (Easy Version) | | | 2100 | 2.5k |
| 1914G2 | Light Bulbs (Hard Version) | | | 2300 | 1.9k |
| 1905E | One-X | | | 2400 | 1.3k |
| 1901E | Compressed Tree | | | 2200 | 2k |
| 1900C | Anji's Binary Tree | | | 1300 | 15.3k |
| 1900E | Transitive Graph | | | 2100 | 2.7k |
| 1895E | Infinite Card Game | | | 2300 | 1.9k |
| 1893E | Cacti Symphony | | | 3500 | 342 |
| 1882D | Tree XOR | | | 1900 | 7.3k |
| 1881F | Minimum Maximum Distance | | | 1700 | 9.8k |
| 1874B | Jellyfish and Math | | | 2400 | 1.4k |
| 1866C | Completely Searching for Inversions | | | 1900 | 3.5k |
| 1863E | Speedrun | | | 2100 | 3.3k |
| 1856E1 | PermuTree (easy version) | | | 1800 | 6.6k |
| 1856E2 | PermuTree (hard version) | | | 2700 | 1.8k |
| 1851E | Nastya and Potions | | | 1500 | 13.6k |
| 1843D | Apple Tree | | | 1200 | 22.3k |
| 1843F1 | Omsk Metro (simple version) | | | 1800 | 6.5k |
| 1843F2 | Omsk Metro (hard version) | | | 2300 | 2.2k |
| 1840F | Railguns | | | 2200 | 2.2k |
| 1839E | Decreasing Game | | | 2400 | 1.6k |
| 1833G | Ksyusha and Chinchilla | | | 1800 | 6.5k |
| 1830A | Copil Copac Draws Trees | | | 1400 | 21.3k |
| 1829D | Gold Rush | | | 1000 | 35k |
| 1824C | LuoTianyi and XOR-Tree | | | 2500 | 1.7k |
| 1822F | Gardening Friends | | | 1700 | 7.9k |
| 1805D | A Wide, Wide Graph | | | 1800 | 9.6k |
| 1805E | There Should Be a Lot of Maximums | | | 2300 | 2k |
| 1804E | Routing | | | 2400 | 1.7k |
| 1799H | Tree Cutting | | | 3200 | 479 |
| 1797D | Li Hua and Tree | | | 1900 | 4.7k |
| 1796E | Colored Subgraphs | | | 2500 | 1.1k |
| 1792E | Divisors and Table | | | 2400 | 1.6k |
| 1788E | Sum Over Zero | | | 2200 | 3.4k |
| 1778F | Maximizing Root | | | 2600 | 964 |
| 1777D | Score of a Tree | | | 1900 | 4.9k |
| 1774E | Two Chess Pieces | | | 1900 | 4k |
| 1771D | Hossam and (sub-)palindromic tree | | | 2100 | 3.3k |
| 1770E | Koxia and Tree | | | 2400 | 1.6k |
| 1763F | Edge Queries | | | 3000 | 750 |
| 1746D | Paths on the Tree | | | 1900 | 5.2k |
| 1741G | Kirill and Company | | | 2200 | 2k |
| 1740E | Hanging Hearts | | | 1800 | 5.1k |
| 1721E | Prefix Function Queries | | | 2200 | 2.7k |
| 1716E | Swap and Maximum Block | | | 2500 | 1.4k |
| 1707D | Partial Virtual Trees | | | 3000 | 1k |
| 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 |
| 1681D | Required Length | | | 1700 | 10.9k |
| 1681F | Unique Occurrences | | | 2300 | 2.4k |
| 1679D | Toss a Coin to Your Graph... | | | 1900 | 6k |
| 1676G | White-Black Balanced Subtrees | | | 1300 | 25.6k |
| 1675F | Vlad and Unfinished Business | | | 1800 | 6.4k |
| 1674G | Remove Directed Edges | | | 2000 | 3k |
| 1667D | Edge Elimination | | | 2900 | 847 |
| 1661B | Getting Zero | | | 1300 | 21.1k |
| 1650G | Counting Shortcuts | | | 2100 | 3.1k |
| 1646D | Weight the Tree | | | 2000 | 4.5k |
| 1637F | Towers | | | 2500 | 2.2k |
| 1625E1 | Cats on the Upgrade (easy version) | | | 2500 | 1.2k |
| 1617E | Christmas Chocolates | | | 2700 | 1.1k |
| 1616G | Just Add an Edge | | | 3500 | 472 |
| 1611E2 | Escape The Maze (hard version) | | | 1900 | 4.4k |
| 1608C | Game Master | | | 1700 | 7.4k |
| 1601B | Frog Traveler | | | 1900 | 5.6k |
| 1598A | Computer Game | | | 800 | 25.9k |
| 1598E | Staircases | | | 2100 | 2.5k |
| 1594D | The Number of Imposters | | | 1700 | 9.8k |
| 1593B | Make it Divisible by 25 | | | 900 | 43.1k |
| 1593F | Red-Black Number | | | 2100 | 2.7k |
| 1592C | Bakry and Partitioning | | | 1700 | 9.3k |
| 1575D | Divisible by Twenty-Five | | | 1800 | 2.9k |
| 1574F | Occurrences | | | 2700 | 786 |
| 1569F | Palindromic Hamiltonian Path | | | 3000 | 493 |
| 1566E | Buds Re-hanging | | | 2000 | 4.5k |
| 1560F2 | Nearest Beautiful Number (hard version) | | | 2100 | 5.1k |
| 1554E | You | | | 2600 | 1.4k |
| 1552D | Array Differentiation | | | 1800 | 8k |
| 1551F | Equidistant Vertices | | | 2200 | 2.2k |
| 1549B | Gregor and the Pawn Game | | | 800 | 27.2k |
| 1547G | How Many Paths? | | | 2100 | 3.7k |
| 1535D | Playoff Tournament | | | 1800 | 8.6k |
| 1534F2 | Falling Sand (Hard Version) | | | 3000 | 790 |
| 1528A | Parsa's Humongous Tree | | | 1600 | 19.8k |
| 1521D | Nastia Plays with a Tree | | | 2500 | 2.4k |
| 1519F | Chests and Keys | | | 3200 | 797 |
| 1499F | Diameter Cuts | | | 2400 | 1.7k |
| 1498D | Bananas in a Microwave | | | 2200 | 2.5k |
| 1498F | Christmas Game | | | 2500 | 1.1k |
| 1486F | Pairs of Paths | | | 2600 | 875 |
| 1485E | Move and Swap | | | 2500 | 1.6k |
| 1476D | Journey | | | 1700 | 9.3k |
| 1472G | Moving to the Capital | | | 2100 | 5.9k |
| 1467E | Distinctive Roots in a Tree | | | 2500 | 1.8k |
| 1453E | Dog Snacks | | | 2300 | 2.3k |
| 1444E | Finding the Vertex | | | 3500 | 171 |