| 1442E | Black, White and Grey Tree | | | 3000 | 805 |
| 1430G | Yet Another DAG Problem | | | 2600 | 949 |
| 1407E | Egor in the Republic of Dagestan | | | 2500 | 2k |
| 1404B | Tree Tag | | | 1900 | 8.3k |
| 1402C | Star Trek | | | 2600 | 271 |
| 1401D | Maximum Distributed Tree | | | 1800 | 10.7k |
| 1400F | x-prime Substrings | | | 2800 | 1.2k |
| 1393D | Rarity and New Dress | | | 2100 | 4.2k |
| 1392G | Omkar and Pies | | | 2900 | 734 |
| 1389G | Directing Edges | | | 2800 | 540 |
| 1387A | Graph | | | 2100 | 974 |
| 1381D | The Majestic Brown Tree Snake | | | 3000 | 832 |
| 1379C | Choosing flowers | | | 2000 | 6.2k |
| 1369F | BareLee | | | 2700 | 743 |
| 1367E | Necklace Assembly | | | 1900 | 5.9k |
| 1363E | Tree Shuffling | | | 2000 | 7.6k |
| 1354E | Graph Coloring | | | 2100 | 3.8k |
| 1344C | Quantifier Question | | | 2600 | 2k |
| 1340C | Nastya and Unexpected Guest | | | 2400 | 2.5k |
| 1338D | Nested Rubber Bands | | | 2700 | 1.2k |
| 1336A | Linova and Kingdom | | | 1600 | 25.5k |
| 1332F | Independent Set | | | 2500 | 1.2k |
| 1324F | Maximum White Subtree | | | 1800 | 13.6k |
| 1320E | Treeland and Viruses | | | 3000 | 1.1k |
| 1312G | Autocompletion | | | 2600 | 1.2k |
| 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 |
| 1285D | Dr. Evil Underscores | | | 1900 | 8.7k |
| 1263F | Economic Difficulties | | | 2400 | 982 |
| 1242C | Sum Balance | | | 2400 | 2k |
| 1238F | The Maximum Subtree | | | 2200 | 2.2k |
| 1220E | Tourism | | | 2200 | 3.1k |
| 1214D | Treasure Island | | | 1900 | 7.2k |
| 1208F | Bits And Pieces | | | 2600 | 3.5k |
| 1200F | Graph Traveler | | | 2300 | 1.2k |
| 1187E | Tree Painting | | | 2100 | 11.9k |
| 1182D | Complete Mirror | | | 2400 | 1k |
| 1178F1 | Short Colorful Strip | | | 2200 | 2.3k |
| 1175E | Minimal Segment Cover | | | 2200 | 4.7k |
| 1172B | Nauuo and Circle | | | 1900 | 4.5k |
| 1156D | 0-1-Tree | | | 2200 | 4.9k |
| 1153D | Serval and Rooted Tree | | | 1900 | 5.6k |
| 1142B | Lynyrd Skynyrd | | | 2000 | 4k |
| 1132E | Knapsack | | | 2300 | 2.1k |
| 1131D | Gourmet choice | | | 2000 | 3.7k |
| 1120D | Power Tree | | | 2500 | 1.8k |
| 1118F2 | Tree Cutting (Hard Version) | | | 2700 | 688 |
| 1111E | Tree | | | 2500 | 1.2k |
| 1101D | GCD Counting | | | 2000 | 5.6k |
| 1099F | Cookies | | | 2400 | 1.1k |
| 1092F | Tree with Maximum Cost | | | 1900 | 11.5k |
| 1073F | Choosing Two Paths | | | 2500 | 668 |
| 1065D | Three Pieces | | | 2200 | 1.5k |
| 1065F | Up and Down the Tree | | | 2500 | 1.4k |
| 1060E | Sergey and Subway | | | 2000 | 3.6k |
| 1056D | Decorate Apple Tree | | | 1600 | 6.8k |
| 1038E | Maximum Matching | | | 2400 | 1.1k |
| 1016F | Road Projects | | | 2600 | 1.1k |
| 990F | Flow Control | | | 2400 | 1.1k |
| 982C | Cut 'em all! | | | 1500 | 16.7k |
| 963B | Destruction of a Tree | | | 2000 | 3k |
| 960E | Alternating Tree | | | 2300 | 2.4k |
| 936B | Sleepy Game | | | 2100 | 3.5k |
| 935E | Fafa and Ancient Mathematics | | | 2300 | 1k |
| 919D | Substring | | | 1700 | 12.8k |
| 917B | MADMAX | | | 1700 | 4k |
| 910A | The Way to Home | | | 800 | 14.3k |
| 909E | Coprocessor | | | 1900 | 2.5k |
| 891D | Sloth | | | 3100 | 344 |
| 855G | Harry Vs Voldemort | | | 3300 | 415 |
| 840B | Leha and another game about graph | | | 2100 | 2.9k |
| 839C | Journey | | | 1500 | 20.8k |
| 835F | Roads in the Kingdom | | | 2500 | 1.3k |
| 814D | An overnight dance in discotheque | | | 2000 | 2.6k |
| 804D | Expected diameter of a tree | | | 2500 | 1.6k |
| 804F | Fake bullions | | | 3400 | 221 |
| 802J3 | Send the Fool Further! (hard) | | | 2400 | 405 |
| 796D | Police Stations | | | 2100 | 7.8k |
| 793E | Problem of offices | | | 2900 | 327 |
| 786A | Berzerk | | | 2000 | 2.9k |
| 771C | Bear and Tree Jumps | | | 2100 | 3.6k |
| 766D | Mahmoud and a Dictionary | | | 2000 | 4k |
| 766E | Mahmoud and a xor trip | | | 2100 | 3.6k |
| 765E | Tree Folding | | | 2200 | 1.4k |
| 763A | Timofey and a tree | | | 1600 | 12.3k |
| 758E | Broken Tree | | | 2600 | 636 |
| 750D | New Year and Fireworks | | | 1900 | 3.2k |
| 743D | Chloe and pleasant prizes | | | 1800 | 4.8k |
| 741B | Arpa's weak amphitheater and Mehrdad's valuable Hoses | | | 1600 | 6k |
| 734E | Anton and Tree | | | 2100 | 5.5k |
| 710E | Generate a String | | | 2000 | 5.9k |
| 708C | Centroids | | | 2300 | 4.5k |
| 700B | Connecting Universities | | | 1800 | 4.7k |
| 685B | Kay and Snowflake | | | 1900 | 5.6k |
| 682C | Alyona and the Tree | | | 1600 | 8.2k |
| 653B | Bear and Compressing | | | 1300 | 5.4k |
| 650C | Table Compression | | | 2200 | 2.2k |
| 633F | The Chocolate Spree | | | 2600 | 1.4k |
| 629E | Famil Door and Roads | | | 2300 | 1.2k |