| 2236G | Criterion in Burlandia | | | 2600 | 385 |
| 2215C | Oriented Journey | | | 2200 | 819 |
| 2194F1 | Again Trees... (Easy Version) | | | 2300 | 967 |
| 2194F2 | Again Trees... (hard version) | | | 3000 | 223 |
| 2153F | Odd Queries on Odd Array | | | 2900 | 337 |
| 2146D1 | Max Sum OR (Easy Version) | | | 1500 | 11.2k |
| 2138C2 | Maple and Tree Beauty (Hard Version) | | | 2000 | 3.6k |
| 2093G | Shorten the Array | | | 1900 | 4k |
| 2064D | Eating | | | 1900 | 6k |
| 1994E | Wooden Game | | | 2000 | 5.7k |
| 1983G | Your Loss | | | 3000 | 325 |
| 1980G | Yasya and the Mysterious Tree | | | 2300 | 1.8k |
| 1970G3 | Min-Fund Prison (Hard) | | | 2400 | 574 |
| 1967C | Fenwick Tree | | | 2300 | 2.3k |
| 1950F | 0, 1, 2, Tree! | | | 1700 | 11.5k |
| 1948G | MST with Matching | | | 3100 | 976 |
| 1929E | Sasha and the Happy Tree Cutting | | | 2300 | 2.1k |
| 1917F | Construct Tree | | | 2500 | 1.3k |
| 1895D | XOR Construction | | | 1900 | 7.2k |
| 1882D | Tree XOR | | | 1900 | 7.3k |
| 1878G | wxhtzdy ORO Tree | | | 2300 | 1.5k |
| 1864E | Guess Game | | | 2100 | 3.1k |
| 1856E2 | PermuTree (hard version) | | | 2700 | 1.8k |
| 1851F | Lisa and the Martians | | | 1800 | 7.8k |
| 1849F | XOR Partition | | | 2700 | 911 |
| 1844G | Tree Weights | | | 3000 | 1.2k |
| 1843C | Sum in Binary Tree | | | 800 | 40.3k |
| 1788F | XOR, Tree, and Queries | | | 2500 | 1.2k |
| 1779F | Xorcerer's Stones | | | 2500 | 1.5k |
| 1778E | The Tree Has Fallen! | | | 2500 | 1.2k |
| 1777D | Score of a Tree | | | 1900 | 4.9k |
| 1777F | Comfortably Numb | | | 2400 | 1.5k |
| 1771F | Hossam and Range Minimum Query | | | 2500 | 1.7k |
| 1767E | Algebra Flash | | | 2500 | 1.3k |
| 1720D1 | Xor-Subsequence (easy version) | | | 1800 | 6.8k |
| 1720D2 | Xor-Subsequence (hard version) | | | 2400 | 2.3k |
| 1709E | XOR Tree | | | 2400 | 4.2k |
| 1709F | Multiset of Strings | | | 2500 | 729 |
| 1670E | Hemose on the Tree | | | 2200 | 2k |
| 1625D | Binary Spiders | | | 2300 | 2.4k |
| 1615D | X(or)-mas Tree | | | 2200 | 2.2k |
| 1605D | Treelabeling | | | 2100 | 3.3k |
| 1592C | Bakry and Partitioning | | | 1700 | 9.3k |
| 1553H | XOR and Distance | | | 2900 | 909 |
| 1508C | Complete the MST | | | 2500 | 1.8k |
| 1498F | Christmas Game | | | 2500 | 1.1k |
| 1479D | Odd Mineral Resource | | | 2900 | 1.4k |
| 1450G | Communism | | | 3500 | 409 |
| 1446C | Xor Tree | | | 2100 | 4.2k |
| 1439E | Cheat and Win | | | 3500 | 301 |
| 1416C | XOR Inverse | | | 2000 | 5.2k |
| 1383C | String Transformation 2 | | | 3100 | 718 |
| 1338B | Edge Weight Assignment | | | 1800 | 9.7k |
| 1299D | Around the World | | | 3000 | 652 |
| 1285D | Dr. Evil Underscores | | | 1900 | 8.7k |
| 979D | Kuro and GCD and XOR and SUM | | | 2200 | 2.3k |
| 914E | Palindromes in a Tree | | | 2400 | 2k |
| 877E | Danil and a Part-time Job | | | 2000 | 5.8k |
| 817E | Choosing The Commander | | | 2000 | 3.9k |
| 792D | Paths in a Complete Binary Tree | | | 1900 | 3.5k |
| 766E | Mahmoud and a xor trip | | | 2100 | 3.6k |
| 754E | Dasha and cyclic table | | | 2600 | 601 |
| 724G | Xor-matic Number of the Graph | | | 2600 | 1.6k |
| 706D | Vasiliy's Multiset | | | 1800 | 13.1k |
| 620E | New Year Tree | | | 2100 | 7.5k |
| 599E | Sandy and Nuts | | | 2600 | 814 |
| 570D | Tree Requests | | | 2200 | 9.3k |
| 566E | Restoring Map | | | 3200 | 719 |
| 429C | Guess the Tree | | | 2300 | 1.1k |
| 282E | Sausage Maximization | | | 2200 | 4.7k |
| 152E | Garden | | | 2500 | 610 |