| 1939B | Evidence Board | | | unrated | 308 |
| 1939C | More Gifts | | | unrated | 419 |
| 1935F | Andrey's Tree | | | 2800 | 634 |
| 1933F | Turtle Mission: Robot and the Earthquake | | | 2100 | 3k |
| 1933G | Turtle Magic: Royal Turtle Shell Pattern | | | 2300 | 1.2k |
| 1931F | Chat Screenshots | | | 1700 | 12.5k |
| 1930F | Maximize the Difference | | | 2700 | 979 |
| 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 |
| 1926F | Vlad and Avoiding X | | | 2200 | 2.1k |
| 1926G | Vlad and Trouble at MIT | | | 1900 | 4.7k |
| 1923E | Count Paths | | | 2000 | 5.3k |
| 1920F1 | Smooth Sailing (Easy Version) | | | 2500 | 1.3k |
| 1918F | Caterpillar on a Tree | | | 2500 | 1.2k |
| 1916E | Happy Life in University | | | 2300 | 2.7k |
| 1916F | Group Division | | | 2900 | 756 |
| 1914F | Programming Competition | | | 1900 | 5.1k |
| 1914G1 | Light Bulbs (Easy Version) | | | 2100 | 2.5k |
| 1914G2 | Light Bulbs (Hard Version) | | | 2300 | 1.9k |
| 1907G | Lights | | | 2200 | 2.4k |
| 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 |
| 1900E | Transitive Graph | | | 2100 | 2.7k |
| 1899G | Unusual Entertainment | | | 1900 | 4.1k |
| 1898F | Vova Escapes the Matrix | | | 2600 | 1k |
| 1895E | Infinite Card Game | | | 2300 | 1.9k |
| 1893A | Anonymous Informant | | | 1400 | 15.3k |
| 1893E | Cacti Symphony | | | 3500 | 342 |
| 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 |
| 1876C | Autosynthesis | | | 2100 | 2.8k |
| 1876D | Lexichromatography | | | 2500 | 1.1k |
| 1874B | Jellyfish and Math | | | 2400 | 1.4k |
| 1873H | Mad City | | | 1700 | 9.7k |
| 1872F | Selling a Menagerie | | | 1800 | 7.7k |
| 1867D | Cyclic Operations | | | 1800 | 6.9k |
| 1867F | Most Different Tree | | | 2700 | 554 |
| 1866C | Completely Searching for Inversions | | | 1900 | 3.5k |
| 1863E | Speedrun | | | 2100 | 3.3k |
| 1861C | Queries for the Array | | | 1600 | 12.5k |
| 1860E | Fast Travel Text Editor | | | 2400 | 1.9k |
| 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 |
| 1851E | Nastya and Potions | | | 1500 | 13.6k |
| 1850H | The Third Letter | | | 1700 | 10.2k |
| 1847F | The Boss's Identity | | | 2500 | 1.1k |
| 1844E | Great Grids | | | 2400 | 2.2k |
| 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 |
| 1840F | Railguns | | | 2200 | 2.2k |
| 1839E | Decreasing Game | | | 2400 | 1.6k |
| 1835D | Doctor's Brown Hypothesis | | | 2900 | 707 |
| 1835F | Good Graph | | | 3500 | 347 |
| 1833E | Round Dance | | | 1600 | 19.5k |
| 1833G | Ksyusha and Chinchilla | | | 1800 | 6.5k |
| 1830A | Copil Copac Draws Trees | | | 1400 | 21.3k |
| 1829D | Gold Rush | | | 1000 | 35k |
| 1829E | The Lakes | | | 1100 | 27.7k |
| 1829F | Forever Winter | | | 1300 | 22.4k |
| 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 |
| 1817B | Fish Graph | | | 1900 | 5.2k |
| 1815C | Between | | | 2200 | 2.4k |
| 1811F | Is It Flower? | | | 2100 | 2.2k |
| 1810E | Monsters | | | 2100 | 4k |
| 1807F | Bouncy Ball | | | 1700 | 7.4k |
| 1806E | Tree Master | | | 2200 | 3.5k |
| 1805D | A Wide, Wide Graph | | | 1800 | 9.6k |
| 1805E | There Should Be a Lot of Maximums | | | 2300 | 2k |
| 1804E | Routing | | | 2400 | 1.7k |
| 1800E2 | Unforgivable Curse (hard version) | | | 1500 | 15.6k |
| 1800G | Symmetree | | | 2200 | 2.6k |
| 1799E | City Union | | | 2300 | 1.4k |
| 1799H | Tree Cutting | | | 3200 | 478 |
| 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 |
| 1795G | Removal Sequences | | | 2700 | 852 |
| 1792E | Divisors and Table | | | 2400 | 1.6k |
| 1790F | Timofey and Black-White Tree | | | 2100 | 4.2k |