| 2238F | Infinite Work | | | 2600 | 406 |
| 2208D1 | Tree Orientation (Easy Version) | | | 1800 | 4.8k |
| 2208D2 | Tree Orientation (Hard Version) | | | 2200 | 2.1k |
| 2193H | Remove the Grail Tree | | | 2400 | 1.1k |
| 2187C | Jerry and Tom | | | 2300 | 1.5k |
| 2131D | Arboris Contractio | | | 1400 | 14.9k |
| 2127H | 23 Rises Again | | | 3100 | 1.9k |
| 2115B | Gellyfish and Camellia Japonica | | | 2100 | 5k |
| 2108E | Spruce Dispute | | | 2600 | 922 |
| 2081D | MST in Modulo Graph | | | 2600 | 1.2k |
| 2065F | Skibidus and Slay | | | 1700 | 7.3k |
| 2063C | Remove Exactly Two | | | 1600 | 15.1k |
| 2062D | Balanced Tree | | | 2200 | 3.6k |
| 2062E1 | The Game (Easy Version) | | | 2000 | 4.4k |
| 2053E | Resourceful Caterpillar Sequence | | | 1900 | 4.6k |
| 2040E | Control of Randomness | | | 2100 | 2.8k |
| 2032D | Genokraken | | | 1800 | 6.3k |
| 2029D | Cool Graph | | | 1900 | 4k |
| 2025F | Choose Your Queries | | | 2700 | 1.1k |
| 2021E1 | Digital Village (Easy Version) | | | 2300 | 2k |
| 2021E3 | Digital Village (Extreme Version) | | | 2800 | 725 |
| 2006A | Iris and Game on the Tree | | | 1700 | 9.8k |
| 1994D | Funny Game | | | 1900 | 7.7k |
| 1980G | Yasya and the Mysterious Tree | | | 2300 | 1.8k |
| 1929E | Sasha and the Happy Tree Cutting | | | 2300 | 2.1k |
| 1927F | Microcycle | | | 1900 | 5.6k |
| 1926G | Vlad and Trouble at MIT | | | 1900 | 4.7k |
| 1918F | Caterpillar on a Tree | | | 2500 | 1.2k |
| 1901E | Compressed Tree | | | 2200 | 2k |
| 1899F | Alex's whims | | | 1600 | 9.7k |
| 1870H | Standard Graph Problem | | | 3500 | 127 |
| 1868D | Flower-like Pseudotree | | | 3000 | 418 |
| 1857G | Counting Graphs | | | 2000 | 5.6k |
| 1843F1 | Omsk Metro (simple version) | | | 1800 | 6.5k |
| 1805D | A Wide, Wide Graph | | | 1800 | 9.6k |
| 1790F | Timofey and Black-White Tree | | | 2100 | 4.2k |
| 1788F | XOR, Tree, and Queries | | | 2500 | 1.2k |
| 1761E | Make It Connected | | | 2400 | 2.2k |
| 1739D | Reset K Edges | | | 1900 | 6.4k |
| 1738F | Connectivity Addicts | | | 2400 | 1.4k |
| 1707C | DFS Trees | | | 2400 | 2k |
| 1682E | Unordered Swaps | | | 2700 | 777 |
| 1654G | Snowy Mountain | | | 2900 | 474 |
| 1633E | Spanning Tree Queries | | | 2400 | 1.8k |
| 1615E | Purple Crayon | | | 2400 | 1.8k |
| 1609D | Social Network | | | 1600 | 8.6k |
| 1583E | Moment of Bloom | | | 2200 | 2.5k |
| 1559D1 | Mocha and Diana (Easy Version) | | | 1400 | 16.5k |
| 1559D2 | Mocha and Diana (Hard Version) | | | 2500 | 3.2k |
| 1515F | Phoenix and Earthquake | | | 2600 | 2.2k |
| 1508C | Complete the MST | | | 2500 | 1.8k |
| 1437D | Minimal Height Tree | | | 1600 | 14.6k |
| 1436D | Bandit in a City | | | 1900 | 6.6k |
| 1408E | Avoid Rainbow Cycles | | | 2400 | 2.2k |
| 1391E | Pairs of Pairs | | | 2600 | 2.1k |
| 1388D | Captain Flint and Treasure | | | 2000 | 7k |
| 1383A | String Transformation 1 | | | 1700 | 11.4k |
| 1369D | TediousLee | | | 1900 | 9.3k |
| 1364D | Ehab's Last Corollary | | | 2100 | 5.1k |
| 1292D | Chaotic V. | | | 2700 | 1.1k |
| 1286B | Numbers on Tree | | | 1800 | 5.7k |
| 1280C | Jeremy Bearimy | | | 2000 | 3.1k |
| 1245D | Shichikuji and Power Grid | | | 1900 | 10.1k |
| 1220E | Tourism | | | 2200 | 3.1k |
| 1141G | Privatization of Roads in Treeland | | | 1900 | 2.6k |
| 1120D | Power Tree | | | 2500 | 1.8k |
| 1098C | Construct a tree | | | 2400 | 1.2k |
| 1056D | Decorate Apple Tree | | | 1600 | 6.8k |
| 1042F | Leaf Sets | | | 2400 | 1.6k |
| 982C | Cut 'em all! | | | 1500 | 16.6k |
| 958B2 | Maximum Control (medium) | | | 2200 | 765 |
| 911F | Tree Destruction | | | 2400 | 2.4k |
| 871E | Restore the Tree | | | 2900 | 204 |
| 780C | Andryusha and Colored Balloons | | | 1600 | 10.3k |
| 767C | Garland | | | 2000 | 4.7k |
| 761E | Dasha and Puzzle | | | 2000 | 2.4k |
| 758E | Broken Tree | | | 2600 | 636 |
| 708C | Centroids | | | 2300 | 4.5k |
| 638C | Road Improvement | | | 1800 | 2.4k |
| 627D | Preorder Test | | | 2600 | 1k |
| 436C | Dungeons and Candies | | | 1800 | 2.9k |
| 343E | Pumping Stations | | | 2900 | 960 |
| 260D | Black and White Tree | | | 2100 | 1.7k |
| 237D | T-decomposition | | | 2000 | 645 |
| 61D | Eternal Victory | | | 1800 | 7.8k |