| 2244F | Anya Loves Trees! | | | unrated | 3.5k |
| 2219C | Coloring a Red Black Tree | | | 2300 | 1.4k |
| 2211E | Minimum Path Cover | | | 2500 | 1k |
| 2205D | Simons and Beating Peaks | | | 1700 | 5.6k |
| 2193H | Remove the Grail Tree | | | 2400 | 1.1k |
| 2192D | Cost of Tree | | | 1800 | 3.9k |
| 2189F | Zhora the Vacuum Cleaner | | | 2800 | 254 |
| 2176E | Remove at the lowest cost | | | 2400 | 1.3k |
| 2174D | Secret Message | | | 3400 | 317 |
| 2171D | Rae Taylor and Trees (easy version) | | | 1400 | 12.3k |
| 2171F | Rae Taylor and Trees (hard version) | | | 1600 | 7.6k |
| 2165E | Rainbow Branch | | | 3200 | 416 |
| 2133E | I Yearned For The Mines | | | 2500 | 1.8k |
| 2127H | 23 Rises Again | | | 3100 | 1.9k |
| 2119F | Volcanic Eruptions | | | 3300 | 191 |
| 2115B | Gellyfish and Camellia Japonica | | | 2100 | 5k |
| 2114E | Kirei Attacks the Estate | | | 1400 | 14.4k |
| 2101E | Kia Bakes a Cake | | | 3100 | 2k |
| 2071C | Trapmigiano Reggiano | | | 1700 | 9.9k |
| 2064D | Eating | | | 1900 | 6k |
| 2063C | Remove Exactly Two | | | 1600 | 15.1k |
| 2063E | Triangle Tree | | | 2300 | 2.4k |
| 2062D | Balanced Tree | | | 2200 | 3.6k |
| 2053E | Resourceful Caterpillar Sequence | | | 1900 | 4.6k |
| 2040E | Control of Randomness | | | 2100 | 2.8k |
| 2033G | Sakurako and Chefir | | | 2200 | 2k |
| 2031E | Penchick and Chloe's Trees | | | 2100 | 2.8k |
| 2028E | Alice's Adventures in the Rabbit Hole | | | 2300 | 2k |
| 2025F | Choose Your Queries | | | 2700 | 1.1k |
| 2023E | Tree of Life | | | 3300 | 194 |
| 2021E1 | Digital Village (Easy Version) | | | 2300 | 2k |
| 2021E3 | Digital Village (Extreme Version) | | | 2800 | 725 |
| 2014F | Sheriff's Defense | | | 2000 | 5.3k |
| 2013F1 | Game in Tree (Easy Version) | | | 2700 | 679 |
| 1997D | Maximize the Root | | | 1500 | 16.3k |
| 1984E | Shuffle | | | 2400 | 1.9k |
| 1976F | Remove Bridges | | | 2800 | 893 |
| 1975D | Paint the Tree | | | 1700 | 7.6k |
| 1951H | Thanos Snap | | | 3200 | 380 |
| 1949C | Annual Ants' Gathering | | | 1900 | 2.6k |
| 1946C | Tree Cutting | | | 1600 | 14.1k |
| 1929E | Sasha and the Happy Tree Cutting | | | 2300 | 2.1k |
| 1926G | Vlad and Trouble at MIT | | | 1900 | 4.7k |
| 1914F | Programming Competition | | | 1900 | 5.1k |
| 1901E | Compressed Tree | | | 2200 | 2k |
| 1889F | Doremy's Average Tree | | | 3500 | 208 |
| 1882D | Tree XOR | | | 1900 | 7.3k |
| 1856E2 | PermuTree (hard version) | | | 2700 | 1.8k |
| 1843F1 | Omsk Metro (simple version) | | | 1800 | 6.5k |
| 1833G | Ksyusha and Chinchilla | | | 1800 | 6.5k |
| 1827B1 | Range Sorting (Easy Version) | | | 2000 | 4.6k |
| 1824C | LuoTianyi and XOR-Tree | | | 2500 | 1.7k |
| 1805D | A Wide, Wide Graph | | | 1800 | 9.6k |
| 1796E | Colored Subgraphs | | | 2500 | 1.1k |
| 1794E | Labeling the Tree with Distances | | | 2400 | 1.6k |
| 1776M | Parmigiana With Seafood | | | 3000 | 514 |
| 1774E | Two Chess Pieces | | | 1900 | 4k |
| 1746D | Paths on the Tree | | | 1900 | 5.2k |
| 1740E | Hanging Hearts | | | 1800 | 5.1k |
| 1695D1 | Tree Queries (Easy Version) | | | 2200 | 2.5k |
| 1695D2 | Tree Queries (Hard Version) | | | 2300 | 2.3k |
| 1693B | Fake Plastic Trees | | | 1700 | 9.7k |
| 1675F | Vlad and Unfinished Business | | | 1800 | 6.4k |
| 1662G | Gastronomic Event | | | unrated | 574 |
| 1637F | Towers | | | 2500 | 2.2k |
| 1611E2 | Escape The Maze (hard version) | | | 1900 | 4.4k |
| 1580D | Subsequence | | | 2900 | 1.2k |
| 1566E | Buds Re-hanging | | | 2000 | 4.5k |
| 1535E | Gold Transfer | | | 2200 | 3.1k |
| 1528A | Parsa's Humongous Tree | | | 1600 | 19.8k |
| 1521D | Nastia Plays with a Tree | | | 2500 | 2.4k |
| 1485E | Move and Swap | | | 2500 | 1.6k |
| 1481F | AB Tree | | | 3100 | 809 |
| 1453E | Dog Snacks | | | 2300 | 2.3k |
| 1442E | Black, White and Grey Tree | | | 3000 | 805 |
| 1416C | XOR Inverse | | | 2000 | 5.2k |
| 1401D | Maximum Distributed Tree | | | 1800 | 10.7k |
| 1394D | Boboniu and Jianghu | | | 2800 | 1.3k |
| 1387B1 | Village (Minimum) | | | 2100 | 2k |
| 1381D | The Majestic Brown Tree Snake | | | 3000 | 832 |
| 1369D | TediousLee | | | 1900 | 9.3k |
| 1363E | Tree Shuffling | | | 2000 | 7.6k |
| 1336A | Linova and Kingdom | | | 1600 | 25.5k |
| 1294F | Three Paths on a Tree | | | 2000 | 7.2k |
| 1292C | Xenon's Attack on the Gangs | | | 2300 | 2.4k |
| 1292D | Chaotic V. | | | 2700 | 1.1k |
| 1285D | Dr. Evil Underscores | | | 1900 | 8.7k |
| 1280D | Miss Punyverse | | | 2500 | 1.3k |
| 1220E | Tourism | | | 2200 | 3.1k |
| 1175E | Minimal Segment Cover | | | 2200 | 4.7k |
| 1153D | Serval and Rooted Tree | | | 1900 | 5.6k |
| 1152D | Neko and Aki's Prank | | | 2100 | 2.6k |
| 1120D | Power Tree | | | 2500 | 1.8k |
| 1088E | Ehab and a component choosing problem | | | 2400 | 1.6k |
| 1073F | Choosing Two Paths | | | 2500 | 668 |
| 1059E | Split the Tree | | | 2400 | 1.7k |
| 1056D | Decorate Apple Tree | | | 1600 | 6.8k |
| 1004E | Sonya and Ice Cream | | | 2400 | 1.3k |
| 990F | Flow Control | | | 2400 | 1.1k |
| 982C | Cut 'em all! | | | 1500 | 16.6k |