| 1481F | AB Tree | | | 3100 | 809 |
| 1467E | Distinctive Roots in a Tree | | | 2500 | 1.8k |
| 1453E | Dog Snacks | | | 2300 | 2.3k |
| 1450G | Communism | | | 3500 | 409 |
| 1446C | Xor Tree | | | 2100 | 4.2k |
| 1444E | Finding the Vertex | | | 3500 | 171 |
| 1442E | Black, White and Grey Tree | | | 3000 | 805 |
| 1416C | XOR Inverse | | | 2000 | 5.2k |
| 1408G | Clusterization Counting | | | 2700 | 1.4k |
| 1404B | Tree Tag | | | 1900 | 8.3k |
| 1402C | Star Trek | | | 2600 | 271 |
| 1401D | Maximum Distributed Tree | | | 1800 | 10.7k |
| 1394D | Boboniu and Jianghu | | | 2800 | 1.3k |
| 1389G | Directing Edges | | | 2800 | 540 |
| 1387B1 | Village (Minimum) | | | 2100 | 2k |
| 1383C | String Transformation 2 | | | 3100 | 718 |
| 1381D | The Majestic Brown Tree Snake | | | 3000 | 832 |
| 1379E | Inverse Genealogy | | | 2800 | 538 |
| 1369D | TediousLee | | | 1900 | 9.3k |
| 1363E | Tree Shuffling | | | 2000 | 7.6k |
| 1338D | Nested Rubber Bands | | | 2700 | 1.2k |
| 1336A | Linova and Kingdom | | | 1600 | 25.5k |
| 1332F | Independent Set | | | 2500 | 1.2k |
| 1326G | Spiderweb Trees | | | 3500 | 112 |
| 1324F | Maximum White Subtree | | | 1800 | 13.6k |
| 1322F | Assigning Fares | | | 3500 | 170 |
| 1320E | Treeland and Viruses | | | 3000 | 1.1k |
| 1299D | Around the World | | | 3000 | 652 |
| 1294F | Three Paths on a Tree | | | 2000 | 7.2k |
| 1292C | Xenon's Attack on the Gangs | | | 2300 | 2.4k |
| 1292D | Chaotic V. | | | 2700 | 1.1k |
| 1285D | Dr. Evil Underscores | | | 1900 | 8.7k |
| 1285E | Delete a Segment | | | 2300 | 2k |
| 1280D | Miss Punyverse | | | 2500 | 1.3k |
| 1276D | Tree Elimination | | | 2900 | 724 |
| 1263F | Economic Difficulties | | | 2400 | 982 |
| 1252B | Cleaning Robots | | | 2300 | 613 |
| 1252D | Find String in a Grid | | | 3000 | 496 |
| 1249F | Maximum Weight Subset | | | 2200 | 2.8k |
| 1244D | Paint the Tree | | | 1800 | 8.4k |
| 1238F | The Maximum Subtree | | | 2200 | 2.2k |
| 1223E | Paint the Tree | | | 2100 | 3k |
| 1220E | Tourism | | | 2200 | 3.1k |
| 1211H | Road Repair in Treeland | | | 3100 | 60 |
| 1193B | Magic Tree | | | unrated | 510 |
| 1187E | Tree Painting | | | 2100 | 11.8k |
| 1182D | Complete Mirror | | | 2400 | 1k |
| 1179D | Fedor Runs for President | | | 2700 | 1.1k |
| 1175E | Minimal Segment Cover | | | 2200 | 4.7k |
| 1172B | Nauuo and Circle | | | 1900 | 4.4k |
| 1168D | Anagram Paths | | | 3000 | 536 |
| 1156D | 0-1-Tree | | | 2200 | 4.9k |
| 1153D | Serval and Rooted Tree | | | 1900 | 5.6k |
| 1152D | Neko and Aki's Prank | | | 2100 | 2.6k |
| 1146F | Leaf Partition | | | 2500 | 1.4k |
| 1142B | Lynyrd Skynyrd | | | 2000 | 4k |
| 1132G | Greedy Subsequences | | | 2400 | 1.3k |
| 1120D | Power Tree | | | 2500 | 1.8k |
| 1119F | Niyaz and Small Degrees | | | 3400 | 964 |
| 1118F2 | Tree Cutting (Hard Version) | | | 2700 | 688 |
| 1111E | Tree | | | 2500 | 1.2k |
| 1109D | Sasha and Interesting Fact from Graph Theory | | | 2400 | 1.5k |
| 1101D | GCD Counting | | | 2000 | 5.5k |
| 1099F | Cookies | | | 2400 | 1.1k |
| 1097G | Vladislav and a Great Legend | | | 3000 | 1.2k |
| 1092F | Tree with Maximum Cost | | | 1900 | 11.5k |
| 1088E | Ehab and a component choosing problem | | | 2400 | 1.6k |
| 1083A | The Fair Nut and the Best Path | | | 1800 | 6.4k |
| 1082F | Speed Dial | | | 2800 | 584 |
| 1073F | Choosing Two Paths | | | 2500 | 668 |
| 1067E | Random Forest Rank | | | 2800 | 591 |
| 1065F | Up and Down the Tree | | | 2500 | 1.4k |
| 1060E | Sergey and Subway | | | 2000 | 3.6k |
| 1059E | Split the Tree | | | 2400 | 1.7k |
| 1056D | Decorate Apple Tree | | | 1600 | 6.8k |
| 1039D | You Are Given a Tree | | | 2800 | 2.4k |
| 1034C | Region Separation | | | 2700 | 1.1k |
| 1032F | Vasya and Maximum Matching | | | 2400 | 1.2k |
| 1025D | Recovering BST | | | 2100 | 4.3k |
| 1016F | Road Projects | | | 2600 | 1.1k |
| 1004E | Sonya and Ice Cream | | | 2400 | 1.3k |
| 1000G | Two-Paths | | | 2700 | 792 |
| 995F | Cowmpany Cowmpensation | | | 2700 | 1.8k |
| 990F | Flow Control | | | 2400 | 1.1k |
| 990G | GCD Counting | | | 2400 | 2.4k |
| 982C | Cut 'em all! | | | 1500 | 16.6k |
| 980F | Cactus to Tree | | | 2900 | 232 |
| 979D | Kuro and GCD and XOR and SUM | | | 2200 | 2.3k |
| 965E | Short Code | | | 2200 | 2k |
| 963B | Destruction of a Tree | | | 2000 | 3k |
| 960E | Alternating Tree | | | 2300 | 2.4k |
| 955F | Heaps | | | 2600 | 2k |
| 935E | Fafa and Ancient Mathematics | | | 2300 | 1k |
| 932D | Tree | | | 2200 | 2.1k |
| 917D | Stranger Trees | | | 2600 | 1.5k |
| 914H | Ember and Storm's Tree Game | | | 3400 | 322 |
| 891D | Sloth | | | 3100 | 344 |
| 868E | Policeman and a Tree | | | 2700 | 569 |
| 859D | Third Month Insanity | | | 2100 | 1.2k |
| 856B | Similar Words | | | 2300 | 653 |