| 2245E | Tom and Jerry | | | unrated | 902 |
| 2244F | Anya Loves Trees! | | | unrated | 3.5k |
| 2238C | Village Guilds | | | 1400 | 8.6k |
| 2236G | Criterion in Burlandia | | | 2600 | 385 |
| 2231E | Graph Cutting | | | 2300 | 1.1k |
| 2230F | Game on Growing Tree | | | 2700 | 510 |
| 2228F | Momoyo and the Network | | | 2700 | 337 |
| 2227H | Fallen Leaves | | | 2100 | 1.7k |
| 2223C | Zhily and Signpost | | | 2300 | 921 |
| 2222G | Statistics on Tree | | | 3100 | 215 |
| 2219C | Coloring a Red Black Tree | | | 2300 | 1.4k |
| 2217H | Closer | | | 2800 | 278 |
| 2208D1 | Tree Orientation (Easy Version) | | | 1800 | 4.8k |
| 2208D2 | Tree Orientation (Hard Version) | | | 2200 | 2.1k |
| 2207D | Boxed Like a Fish | | | 2200 | 2.3k |
| 2195E | Idiot First Search | | | 1500 | 9.4k |
| 2194F1 | Again Trees... (Easy Version) | | | 2300 | 967 |
| 2194F2 | Again Trees... (hard version) | | | 3000 | 223 |
| 2193G | Paths in a Tree | | | 2100 | 2.4k |
| 2193H | Remove the Grail Tree | | | 2400 | 1.1k |
| 2189F | Zhora the Vacuum Cleaner | | | 2800 | 254 |
| 2187C | Jerry and Tom | | | 2300 | 1.5k |
| 2184F | Cherry Tree | | | 1900 | 4.2k |
| 2183D1 | Tree Coloring (Easy Version) | | | 1500 | 9.3k |
| 2183D2 | Tree Coloring (Hard Version) | | | 2100 | 2.6k |
| 2183F | Jumping Man | | | 2500 | 1.2k |
| 2182G | Short Garland | | | 2800 | 383 |
| 2176E | Remove at the lowest cost | | | 2400 | 1.3k |
| 2167F | Tree, TREE!!! | | | 1600 | 7.6k |
| 2164F1 | Chain Prefix Rank (Easy Version) | | | 2600 | 1.3k |
| 2164F2 | Chain Prefix Rank (Hard Version) | | | 2900 | 648 |
| 2155F | Juan's Colorful Tree | | | 2800 | 745 |
| 2154D | Catshock | | | 1900 | 5k |
| 2138C1 | Maple and Tree Beauty (Easy Version) | | | 1800 | 5.7k |
| 2138C2 | Maple and Tree Beauty (Hard Version) | | | 2000 | 3.6k |
| 2134D | Sliding Tree | | | 2300 | 3.8k |
| 2133E | I Yearned For The Mines | | | 2500 | 1.8k |
| 2127D | Root was Built by Love, Broken by Destiny | | | 1800 | 7.5k |
| 2127E | Ancient Tree | | | 2100 | 4.4k |
| 2127H | 23 Rises Again | | | 3100 | 1.9k |
| 2126F | 1-1-1, Free Tree! | | | 2000 | 4.4k |
| 2119F | Volcanic Eruptions | | | 3300 | 191 |
| 2117F | Wildflower | | | 1800 | 6.1k |
| 2115B | Gellyfish and Camellia Japonica | | | 2100 | 5k |
| 2114E | Kirei Attacks the Estate | | | 1400 | 14.4k |
| 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 |
| 2107D | Apple Tree Traversing | | | 2100 | 3.6k |
| 2106G2 | Baudelaire (hard version) | | | 2500 | 647 |
| 2097B | Baggage Claim | | | 2300 | 2k |
| 2093G | Shorten the Array | | | 1900 | 4k |
| 2071C | Trapmigiano Reggiano | | | 1700 | 9.9k |
| 2070D | Tree Jumps | | | 1600 | 11.5k |
| 2065F | Skibidus and Slay | | | 1700 | 7.3k |
| 2063C | Remove Exactly Two | | | 1600 | 15.1k |
| 2063E | Triangle Tree | | | 2300 | 2.4k |
| 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 |
| 2050G | Tree Destruction | | | 1900 | 5.5k |
| 2044G1 | Medium Demon Problem (easy version) | | | 1700 | 7.6k |
| 2044G2 | Medium Demon Problem (hard version) | | | 1900 | 4k |
| 2042E | Vertex Pairs | | | 2900 | 535 |
| 2040D | Non Prime Tree | | | 1900 | 5.9k |
| 2040E | Control of Randomness | | | 2100 | 2.8k |
| 2035F | Tree Operations | | | 2500 | 1.1k |
| 2033G | Sakurako and Chefir | | | 2200 | 2k |
| 2031E | Penchick and Chloe's Trees | | | 2100 | 2.8k |
| 2029D | Cool Graph | | | 1900 | 4k |
| 2028E | Alice's Adventures in the Rabbit Hole | | | 2300 | 2k |
| 2026F | Bermart Ice Cream | | | 2700 | 413 |
| 2025F | Choose Your Queries | | | 2700 | 1.1k |
| 2021E1 | Digital Village (Easy Version) | | | 2300 | 2k |
| 2021E3 | Digital Village (Extreme Version) | | | 2800 | 725 |
| 2018C | Tree Pruning | | | 1700 | 10.2k |
| 2014F | Sheriff's Defense | | | 2000 | 5.3k |
| 2006A | Iris and Game on the Tree | | | 1700 | 9.8k |
| 2006B | Iris and the Tree | | | 1800 | 4.4k |
| 2006E | Iris's Full Binary Tree | | | 3100 | 328 |
| 2002D1 | DFS Checker (Easy Version) | | | 1900 | 5.2k |
| 2002D2 | DFS Checker (Hard Version) | | | 2300 | 2.9k |
| 2001C | Guess The Tree | | | 1500 | 13.1k |
| 1997D | Maximize the Root | | | 1500 | 16.3k |
| 1994F | Stardew Valley | | | 2500 | 1.6k |
| 1990E1 | Catch the Mole(Easy Version) | | | 2500 | 1.2k |
| 1990E2 | Catch the Mole(Hard Version) | | | 2600 | 1.2k |
| 1988D | The Omnipotent Monster Killer | | | 2000 | 6.1k |
| 1987E | Wonderful Tree! | | | 2000 | 4.2k |
| 1986F | Non-academic Problem | | | 1900 | 6.7k |
| 1980G | Yasya and the Mysterious Tree | | | 2300 | 1.8k |
| 1976E | Splittable Permutations | | | 2500 | 1.3k |
| 1976F | Remove Bridges | | | 2800 | 893 |
| 1975D | Paint the Tree | | | 1700 | 7.6k |
| 1975E | Chain Queries | | | 2100 | 2.9k |
| 1970C2 | Game on Tree (Medium) | | | 1700 | 4.5k |