| 2241E | Fair and Square | | | 1600 | 5.8k |
| 2229E | Deconstruction Tree | | | 2100 | 2k |
| 2195G | Idiot First Search and Queries | | | 2300 | 1.2k |
| 2193H | Remove the Grail Tree | | | 2400 | 1.1k |
| 2184F | Cherry Tree | | | 1900 | 4.2k |
| 2164F2 | Chain Prefix Rank (Hard Version) | | | 2900 | 648 |
| 2138C1 | Maple and Tree Beauty (Easy Version) | | | 1800 | 5.7k |
| 2127H | 23 Rises Again | | | 3100 | 1.9k |
| 2115B | Gellyfish and Camellia Japonica | | | 2100 | 5k |
| 2112E | Tree Colorings | | | 2200 | 3.5k |
| 2097B | Baggage Claim | | | 2300 | 2k |
| 2063C | Remove Exactly Two | | | 1600 | 15.1k |
| 2063F1 | Counting Is Not Fun (Easy Version) | | | 2400 | 1.6k |
| 2062D | Balanced Tree | | | 2200 | 3.6k |
| 2053E | Resourceful Caterpillar Sequence | | | 1900 | 4.6k |
| 2052M | Managing Cluster | | | 2700 | 403 |
| 2044G2 | Medium Demon Problem (hard version) | | | 1900 | 4k |
| 2040E | Control of Randomness | | | 2100 | 2.8k |
| 2025F | Choose Your Queries | | | 2700 | 1.1k |
| 2021E1 | Digital Village (Easy Version) | | | 2300 | 2k |
| 2021E2 | Digital Village (Hard Version) | | | 2500 | 1.3k |
| 2021E3 | Digital Village (Extreme Version) | | | 2800 | 725 |
| 2020D | Connect the Dots | | | 1800 | 7.6k |
| 1970G2 | Min-Fund Prison (Medium) | | | 2200 | 907 |
| 1970G3 | Min-Fund Prison (Hard) | | | 2400 | 574 |
| 1929E | Sasha and the Happy Tree Cutting | | | 2300 | 2.1k |
| 1926G | Vlad and Trouble at MIT | | | 1900 | 4.7k |
| 1923E | Count Paths | | | 2000 | 5.3k |
| 1914G1 | Light Bulbs (Easy Version) | | | 2100 | 2.5k |
| 1901E | Compressed Tree | | | 2200 | 2k |
| 1881F | Minimum Maximum Distance | | | 1700 | 9.8k |
| 1866K | Keen Tree Calculation | | | 2500 | 585 |
| 1843F1 | Omsk Metro (simple version) | | | 1800 | 6.5k |
| 1830A | Copil Copac Draws Trees | | | 1400 | 21.3k |
| 1823F | Random Walk | | | 2600 | 1.4k |
| 1822F | Gardening Friends | | | 1700 | 7.8k |
| 1805D | A Wide, Wide Graph | | | 1800 | 9.6k |
| 1778F | Maximizing Root | | | 2600 | 964 |
| 1767E | Algebra Flash | | | 2500 | 1.3k |
| 1763F | Edge Queries | | | 3000 | 750 |
| 1709F | Multiset of Strings | | | 2500 | 729 |
| 1676G | White-Black Balanced Subtrees | | | 1300 | 25.6k |
| 1625E1 | Cats on the Upgrade (easy version) | | | 2500 | 1.2k |
| 1617E | Christmas Chocolates | | | 2700 | 1.1k |
| 1592C | Bakry and Partitioning | | | 1700 | 9.3k |
| 1585G | Poachers | | | 2500 | 339 |
| 1547G | How Many Paths? | | | 2100 | 3.7k |
| 1540B | Tree Array | | | 2300 | 3.1k |
| 1534H | Lost Nodes | | | 3500 | 314 |
| 1495F | Squares | | | 3300 | 533 |
| 1408G | Clusterization Counting | | | 2700 | 1.4k |
| 1402C | Star Trek | | | 2600 | 271 |
| 1389G | Directing Edges | | | 2800 | 540 |
| 1383C | String Transformation 2 | | | 3100 | 718 |
| 1369D | TediousLee | | | 1900 | 9.3k |
| 1324F | Maximum White Subtree | | | 1800 | 13.6k |
| 1299D | Around the World | | | 3000 | 652 |
| 1292D | Chaotic V. | | | 2700 | 1.1k |
| 1285E | Delete a Segment | | | 2300 | 2k |
| 1263F | Economic Difficulties | | | 2400 | 982 |
| 1244D | Paint the Tree | | | 1800 | 8.4k |
| 1238F | The Maximum Subtree | | | 2200 | 2.2k |
| 1220E | Tourism | | | 2200 | 3.1k |
| 1120D | Power Tree | | | 2500 | 1.8k |
| 1111E | Tree | | | 2500 | 1.2k |
| 1056D | Decorate Apple Tree | | | 1600 | 6.8k |
| 982C | Cut 'em all! | | | 1500 | 16.6k |
| 980F | Cactus to Tree | | | 2900 | 232 |
| 868E | Policeman and a Tree | | | 2700 | 569 |
| 855G | Harry Vs Voldemort | | | 3300 | 415 |
| 839C | Journey | | | 1500 | 20.8k |
| 835F | Roads in the Kingdom | | | 2500 | 1.3k |
| 830D | Singer House | | | 2800 | 1k |
| 830E | Perpetual Motion Machine | | | 3100 | 373 |
| 796D | Police Stations | | | 2100 | 7.8k |
| 763A | Timofey and a tree | | | 1600 | 12.1k |
| 758E | Broken Tree | | | 2600 | 636 |
| 743D | Chloe and pleasant prizes | | | 1800 | 4.8k |
| 708C | Centroids | | | 2300 | 4.5k |
| 700B | Connecting Universities | | | 1800 | 4.7k |
| 682C | Alyona and the Tree | | | 1600 | 8.2k |
| 633F | The Chocolate Spree | | | 2600 | 1.4k |
| 627D | Preorder Test | | | 2600 | 1k |
| 613D | Kingdom and its Cities | | | 2800 | 4.3k |
| 592D | Super M | | | 2200 | 3k |
| 557E | Ann and Half-Palindrome | | | 2300 | 1.3k |
| 533B | Work Group | | | 2000 | 2.7k |
| 522A | Reposts | | | 1200 | 19.3k |
| 231E | Cactus | | | 2100 | 2.4k |
| 219D | Choosing Capital for Treeland | | | 1700 | 13k |
| 152E | Garden | | | 2500 | 610 |
| 87D | Beautiful Road | | | 2300 | 1.1k |
| 81E | Pairs | | | 2700 | 460 |
| 51F | Caterpillar | | | 2800 | 845 |
| 14D | Two Paths | | | 1900 | 5.4k |