| 1254E | Send Tree to Charlie | | | 3300 | 459 |
| 1238F | The Maximum Subtree | | | 2200 | 2.2k |
| 1220E | Tourism | | | 2200 | 3.1k |
| 1214H | Tiles Placement | | | 2800 | 493 |
| 1209F | Koala and Notebook | | | 2600 | 1.4k |
| 1207G | Indie Album | | | 2700 | 1.3k |
| 1192B | Dynamic Diameter | | | unrated | 1.6k |
| 1188A2 | Add on a Tree: Revolution | | | 2500 | 1.3k |
| 1187E | Tree Painting | | | 2100 | 11.8k |
| 1184E2 | Daleks' Invasion (medium) | | | 2100 | 1.1k |
| 1182D | Complete Mirror | | | 2400 | 1k |
| 1176E | Cover it! | | | 1700 | 14k |
| 1175E | Minimal Segment Cover | | | 2200 | 4.7k |
| 1172B | Nauuo and Circle | | | 1900 | 4.4k |
| 1156D | 0-1-Tree | | | 2200 | 4.9k |
| 1153D | Serval and Rooted Tree | | | 1900 | 5.6k |
| 1143C | Queen | | | 1400 | 18.6k |
| 1142B | Lynyrd Skynyrd | | | 2000 | 4k |
| 1141G | Privatization of Roads in Treeland | | | 1900 | 2.6k |
| 1139C | Edgy Trees | | | 1500 | 17.4k |
| 1120D | Power Tree | | | 2500 | 1.8k |
| 1118F1 | Tree Cutting (Easy Version) | | | 1800 | 6.8k |
| 1118F2 | Tree Cutting (Hard Version) | | | 2700 | 688 |
| 1111E | Tree | | | 2500 | 1.2k |
| 1101D | GCD Counting | | | 2000 | 5.5k |
| 1099F | Cookies | | | 2400 | 1.1k |
| 1098A | Sum in the tree | | | 1600 | 9.7k |
| 1098C | Construct a tree | | | 2400 | 1.2k |
| 1092E | Minimal Diameter Forest | | | 2000 | 2.2k |
| 1092F | Tree with Maximum Cost | | | 1900 | 11.5k |
| 1073F | Choosing Two Paths | | | 2500 | 668 |
| 1065F | Up and Down the Tree | | | 2500 | 1.4k |
| 1062E | Company | | | 2300 | 2.1k |
| 1060E | Sergey and Subway | | | 2000 | 3.6k |
| 1057A | Bmail Computer Network | | | 900 | 7.7k |
| 1056D | Decorate Apple Tree | | | 1600 | 6.8k |
| 1045C | Hyperspace Highways | | | 2300 | 864 |
| 1044B | Intersecting Subtrees | | | 1900 | 1.7k |
| 1042F | Leaf Sets | | | 2400 | 1.6k |
| 1037D | Valid BFS? | | | 1700 | 19.9k |
| 1023F | Mobile Phone Network | | | 2600 | 1.1k |
| 1016F | Road Projects | | | 2600 | 1.1k |
| 1010D | Mars rover | | | 2000 | 2.6k |
| 1006E | Military Problem | | | 1600 | 12k |
| 1000E | We Need More Bosses | | | 2100 | 7k |
| 990F | Flow Control | | | 2400 | 1.1k |
| 982C | Cut 'em all! | | | 1500 | 16.6k |
| 979C | Kuro and Walking Route | | | 1600 | 7.5k |
| 963B | Destruction of a Tree | | | 2000 | 3k |
| 962F | Simple Cycles Edges | | | 2400 | 1.7k |
| 960E | Alternating Tree | | | 2300 | 2.4k |
| 958B2 | Maximum Control (medium) | | | 2200 | 765 |
| 936E | Iqea | | | 3400 | 261 |
| 935E | Fafa and Ancient Mathematics | | | 2300 | 1k |
| 930A | Peculiar apple-tree | | | 1500 | 8.6k |
| 911F | Tree Destruction | | | 2400 | 2.4k |
| 891D | Sloth | | | 3100 | 344 |
| 870E | Points, Lines and Ready-made Titles | | | 2300 | 1.3k |
| 864F | Cities Excursions | | | 2700 | 706 |
| 862B | Mahmoud and Ehab and the bipartiteness | | | 1300 | 27.1k |
| 860E | Arkady and a Nobody-men | | | 2700 | 554 |
| 859E | Desk Disorder | | | 2100 | 2.2k |
| 855G | Harry Vs Voldemort | | | 3300 | 415 |
| 852I | Dating | | | 2300 | 786 |
| 847L | Berland SU Computer Network | | | 2400 | 363 |
| 846E | Chemistry in Berland | | | 2300 | 1.1k |
| 843C | Upgrading Tree | | | 2600 | 416 |
| 842C | Ilya And The Tree | | | 2000 | 3.8k |
| 842E | Nikita and game | | | 2800 | 513 |
| 839C | Journey | | | 1500 | 20.8k |
| 838B | Diverging Directions | | | 2100 | 1.1k |
| 835F | Roads in the Kingdom | | | 2500 | 1.3k |
| 832D | Misha, Grisha and Underground | | | 1900 | 4.7k |
| 827D | Best Edge Weight | | | 2700 | 1.5k |
| 825G | Tree Queries | | | 2500 | 1.5k |
| 822F | Madness | | | 2500 | 400 |
| 814D | An overnight dance in discotheque | | | 2000 | 2.6k |
| 812D | Sagheer and Kindergarten | | | 2700 | 382 |
| 804D | Expected diameter of a tree | | | 2500 | 1.6k |
| 802J1 | Send the Fool Further! (easy) | | | 1400 | 6.7k |
| 802J3 | Send the Fool Further! (hard) | | | 2400 | 404 |
| 796D | Police Stations | | | 2100 | 7.8k |
| 793E | Problem of offices | | | 2900 | 327 |
| 786D | Rap God | | | 3400 | 174 |
| 780C | Andryusha and Colored Balloons | | | 1600 | 10.3k |
| 778C | Peterson Polyglot | | | 2500 | 1k |
| 771C | Bear and Tree Jumps | | | 2100 | 3.6k |
| 767C | Garland | | | 2000 | 4.7k |
| 766E | Mahmoud and a xor trip | | | 2100 | 3.6k |
| 765E | Tree Folding | | | 2200 | 1.4k |
| 763A | Timofey and a tree | | | 1600 | 12.1k |
| 761E | Dasha and Puzzle | | | 2000 | 2.4k |
| 758E | Broken Tree | | | 2600 | 636 |
| 755C | PolandBall and Forest | | | 1300 | 15.4k |
| 748F | Santa Clauses and a Soccer Championship | | | 2300 | 744 |
| 743D | Chloe and pleasant prizes | | | 1800 | 4.8k |
| 741D | Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths | | | 2900 | 3.8k |
| 739B | Alyona and a tree | | | 1900 | 5.2k |
| 734E | Anton and Tree | | | 2100 | 5.5k |
| 722D | Generating Sets | | | 1900 | 3.4k |