| 2236G | Criterion in Burlandia | | | 2600 | 385 |
| 2230F | Game on Growing Tree | | | 2700 | 510 |
| 2226G | Stop Spot | | | 3000 | 192 |
| 2219D | MEX Replacement on Tree | | | 2700 | 533 |
| 2218F | The 67th Tree Problem | | | 1500 | 9k |
| 2209F | Dynamic Values And Maximum Sum | | | 2700 | 460 |
| 2205D | Simons and Beating Peaks | | | 1700 | 5.6k |
| 2193H | Remove the Grail Tree | | | 2400 | 1.1k |
| 2189F | Zhora the Vacuum Cleaner | | | 2800 | 254 |
| 2183D2 | Tree Coloring (Hard Version) | | | 2100 | 2.6k |
| 2176E | Remove at the lowest cost | | | 2400 | 1.3k |
| 2171D | Rae Taylor and Trees (easy version) | | | 1400 | 12.3k |
| 2171F | Rae Taylor and Trees (hard version) | | | 1600 | 7.6k |
| 2153F | Odd Queries on Odd Array | | | 2900 | 337 |
| 2152G | Query Jungle | | | 2900 | 2.7k |
| 2150F | Cycle Closing | | | 3000 | 224 |
| 2134D | Sliding Tree | | | 2300 | 3.8k |
| 2127H | 23 Rises Again | | | 3100 | 1.9k |
| 2126F | 1-1-1, Free Tree! | | | 2000 | 4.4k |
| 2113E | From Kazan with Love | | | 2800 | 430 |
| 2108E | Spruce Dispute | | | 2600 | 922 |
| 2107D | Apple Tree Traversing | | | 2100 | 3.6k |
| 2106G2 | Baudelaire (hard version) | | | 2500 | 647 |
| 2097B | Baggage Claim | | | 2300 | 2k |
| 2063F1 | Counting Is Not Fun (Easy Version) | | | 2400 | 1.6k |
| 2063F2 | Counting Is Not Fun (Hard Version) | | | 2700 | 951 |
| 2062E2 | The Game (Hard Version) | | | 3000 | 464 |
| 2048F | Kevin and Math Class | | | 2500 | 1.3k |
| 2044G1 | Medium Demon Problem (easy version) | | | 1700 | 7.6k |
| 2044G2 | Medium Demon Problem (hard version) | | | 1900 | 4k |
| 2042E | Vertex Pairs | | | 2900 | 535 |
| 2041I | Auto Complete | | | 2300 | 688 |
| 2032D | Genokraken | | | 1800 | 6.3k |
| 2031E | Penchick and Chloe's Trees | | | 2100 | 2.8k |
| 2026F | Bermart Ice Cream | | | 2700 | 413 |
| 2021E1 | Digital Village (Easy Version) | | | 2300 | 2k |
| 2013F1 | Game in Tree (Easy Version) | | | 2700 | 679 |
| 1975E | Chain Queries | | | 2100 | 2.9k |
| 1950F | 0, 1, 2, Tree! | | | 1700 | 11.5k |
| 1949J | Amanda the Amoeba | | | 2600 | 550 |
| 1946C | Tree Cutting | | | 1600 | 14.1k |
| 1935F | Andrey's Tree | | | 2800 | 634 |
| 1927F | Microcycle | | | 1900 | 5.6k |
| 1926G | Vlad and Trouble at MIT | | | 1900 | 4.7k |
| 1918F | Caterpillar on a Tree | | | 2500 | 1.2k |
| 1904E | Tree Queries | | | 2500 | 1.4k |
| 1904F | Beautiful Tree | | | 2800 | 581 |
| 1902F | Trees and XOR Queries Again | | | 2400 | 1.5k |
| 1889D | Game of Stacks | | | 3000 | 982 |
| 1879E | Interactive Game with Coloring | | | 2400 | 1.6k |
| 1878G | wxhtzdy ORO Tree | | | 2300 | 1.5k |
| 1868C | Travel Plan | | | 2400 | 1.4k |
| 1868D | Flower-like Pseudotree | | | 3000 | 418 |
| 1866K | Keen Tree Calculation | | | 2500 | 585 |
| 1861C | Queries for the Array | | | 1600 | 12.5k |
| 1856E2 | PermuTree (hard version) | | | 2700 | 1.8k |
| 1851G | Vlad and the Mountains | | | 2000 | 4.2k |
| 1844G | Tree Weights | | | 3000 | 1.2k |
| 1833G | Ksyusha and Chinchilla | | | 1800 | 6.5k |
| 1819C | The Fox and the Complete Tree Traversal | | | 2400 | 1.8k |
| 1815B | Sum Graph | | | 2000 | 3.7k |
| 1800G | Symmetree | | | 2200 | 2.6k |
| 1797D | Li Hua and Tree | | | 1900 | 4.7k |
| 1794E | Labeling the Tree with Distances | | | 2400 | 1.6k |
| 1788F | XOR, Tree, and Queries | | | 2500 | 1.2k |
| 1783G | Weighed Tree Radius | | | 2800 | 625 |
| 1773B | BinCoin | | | 2200 | 982 |
| 1714F | Build a Tree and That Is It | | | 1900 | 3.7k |
| 1682D | Circular Spanning Tree | | | 2000 | 3.8k |
| 1675D | Vertical Paths | | | 1300 | 15.1k |
| 1648E | Air Reform | | | 3200 | 601 |
| 1646D | Weight the Tree | | | 2000 | 4.5k |
| 1625D | Binary Spiders | | | 2300 | 2.4k |
| 1617E | Christmas Chocolates | | | 2700 | 1.1k |
| 1609D | Social Network | | | 1600 | 8.6k |
| 1605D | Treelabeling | | | 2100 | 3.3k |
| 1594E2 | Rubik's Cube Coloring (hard version) | | | 2300 | 1.7k |
| 1593E | Gardener and Tree | | | 1600 | 15.1k |
| 1592D | Hemose in ICPC ? | | | 2300 | 2.7k |
| 1535D | Playoff Tournament | | | 1800 | 8.6k |
| 1527D | MEX Tree | | | 2400 | 2.3k |
| 1523C | Compression and Expansion | | | 1600 | 9.2k |
| 1521D | Nastia Plays with a Tree | | | 2500 | 2.4k |
| 1511C | Yet Another Card Deck | | | 1100 | 34.4k |
| 1463E | Plan of Lectures | | | 2400 | 1.8k |
| 1416D | Graph and Queries | | | 2600 | 2.9k |
| 1401D | Maximum Distributed Tree | | | 1800 | 10.7k |
| 1388D | Captain Flint and Treasure | | | 2000 | 7k |
| 1385F | Removing Leaves | | | 2300 | 2.9k |
| 1380E | Merging Towers | | | 2300 | 2.5k |
| 1364D | Ehab's Last Corollary | | | 2100 | 5.1k |
| 1361D | Johnny and James | | | 2900 | 388 |
| 1244D | Paint the Tree | | | 1800 | 8.4k |
| 1228F | One Node is Gone | | | 2500 | 620 |
| 1208H | Red Blue Tree | | | 3500 | 253 |
| 1188A2 | Add on a Tree: Revolution | | | 2500 | 1.3k |
| 1182D | Complete Mirror | | | 2400 | 1k |
| 1181D | Irrigation | | | 2200 | 2.9k |
| 1179C | Serge and Dining Room | | | 2200 | 2.5k |
| 1175E | Minimal Segment Cover | | | 2200 | 4.7k |