| 2239E | The end of this world, | | | 3300 | 154 |
| 2222F | Building Tree | | | 2600 | 716 |
| 2208D1 | Tree Orientation (Easy Version) | | | 1800 | 4.8k |
| 2208D2 | Tree Orientation (Hard Version) | | | 2200 | 2.1k |
| 2207F | Hanabi | | | 2900 | 315 |
| 2205F | Simons and Reconstructing His Roads | | | 2400 | 714 |
| 2187C | Jerry and Tom | | | 2300 | 1.5k |
| 2164E | Journey | | | 2300 | 3.6k |
| 2158E | Sink | | | 2600 | 665 |
| 2155F | Juan's Colorful Tree | | | 2800 | 745 |
| 2141H | Merging Vertices in a Graph | | | 2700 | 85 |
| 2135C | By the Assignment | | | 2000 | 5.4k |
| 2129A | Double Perspective | | | 1300 | 18.3k |
| 2117G | Omg Graph | | | 1900 | 5.4k |
| 2108C | Neo's Escape | | | 1500 | 15.1k |
| 2104G | Modulo 3 | | | 2700 | 553 |
| 2097B | Baggage Claim | | | 2300 | 2k |
| 2086C | Disappearing Permutation | | | 1300 | 16.6k |
| 2081D | MST in Modulo Graph | | | 2600 | 1.2k |
| 2069F | Graph Inclusion | | | 2800 | 824 |
| 2068E | Porto Vs. Benfica | | | 2800 | 384 |
| 2063F1 | Counting Is Not Fun (Easy Version) | | | 2400 | 1.6k |
| 2063F2 | Counting Is Not Fun (Hard Version) | | | 2700 | 951 |
| 2060E | Graph Composition | | | 1500 | 12.7k |
| 2057E1 | Another Exercise on Graphs (Easy Version) | | | 2300 | 2.7k |
| 2057E2 | Another Exercise on Graphs (hard version) | | | 2500 | 2k |
| 2051G | Snakes | | | 2100 | 2.5k |
| 2044G2 | Medium Demon Problem (hard version) | | | 1900 | 4k |
| 2033E | Sakurako, Kosuke, and the Permutation | | | 1400 | 14.5k |
| 2029D | Cool Graph | | | 1900 | 4k |
| 2022E1 | Billetes MX (Easy Version) | | | 2500 | 780 |
| 2022E2 | Billetes MX (Hard Version) | | | 2600 | 730 |
| 2021E1 | Digital Village (Easy Version) | | | 2300 | 2k |
| 2021E2 | Digital Village (Hard Version) | | | 2500 | 1.3k |
| 2021E3 | Digital Village (Extreme Version) | | | 2800 | 725 |
| 2020D | Connect the Dots | | | 1800 | 7.6k |
| 2008D | Sakurako's Hobby | | | 1100 | 23.9k |
| 1994D | Funny Game | | | 1900 | 7.7k |
| 1985H1 | Maximize the Largest Component (Easy Version) | | | 1700 | 7.4k |
| 1981E | Turtle and Intersected Segments | | | 2600 | 1.3k |
| 1978F | Large Graph | | | 2400 | 1.6k |
| 1956F | Nene and the Passing Game | | | 3000 | 747 |
| 1940A | Parallel Universes | | | unrated | 106 |
| 1940C | Burenka and Pether | | | unrated | 44 |
| 1927F | Microcycle | | | 1900 | 5.6k |
| 1923E | Count Paths | | | 2000 | 5.3k |
| 1920F1 | Smooth Sailing (Easy Version) | | | 2500 | 1.3k |
| 1920F2 | Smooth Sailing (Hard Version) | | | 3000 | 668 |
| 1914G1 | Light Bulbs (Easy Version) | | | 2100 | 2.5k |
| 1900E | Transitive Graph | | | 2100 | 2.7k |
| 1895E | Infinite Card Game | | | 2300 | 1.9k |
| 1876D | Lexichromatography | | | 2500 | 1.1k |
| 1873H | Mad City | | | 1700 | 9.7k |
| 1872F | Selling a Menagerie | | | 1800 | 7.7k |
| 1857G | Counting Graphs | | | 2000 | 5.6k |
| 1851G | Vlad and the Mountains | | | 2000 | 4.2k |
| 1850H | The Third Letter | | | 1700 | 10.2k |
| 1844E | Great Grids | | | 2400 | 2.2k |
| 1833E | Round Dance | | | 1600 | 19.5k |
| 1829E | The Lakes | | | 1100 | 27.7k |
| 1810E | Monsters | | | 2100 | 4k |
| 1800E1 | Unforgivable Curse (easy version) | | | 1400 | 15.9k |
| 1800E2 | Unforgivable Curse (hard version) | | | 1500 | 15.6k |
| 1788F | XOR, Tree, and Queries | | | 2500 | 1.2k |
| 1787D | Game on Axis | | | 1900 | 3.9k |
| 1770D | Koxia and Game | | | 2000 | 4.5k |
| 1763F | Edge Queries | | | 3000 | 750 |
| 1761E | Make It Connected | | | 2400 | 2.2k |
| 1758E | Tick, Tock | | | 2500 | 1.1k |
| 1738D | Permutation Addicts | | | 1900 | 3.8k |
| 1738F | Connectivity Addicts | | | 2400 | 1.4k |
| 1735C | Phase Shift | | | 1400 | 11k |
| 1726C | Jatayu's Balanced Bracket Sequence | | | 1300 | 13.5k |
| 1726D | Edge Split | | | 2000 | 4.2k |
| 1707C | DFS Trees | | | 2400 | 2k |
| 1702E | Split Into Two Sets | | | 1600 | 18.7k |
| 1696F | Tree Recovery | | | 2600 | 1.2k |
| 1691E | Number of Groups | | | 2300 | 2.2k |
| 1689E | ANDfinity | | | 2500 | 1.4k |
| 1680F | Lenient Vertex Cover | | | 2600 | 979 |
| 1670C | Where is the Pizza? | | | 1400 | 11.1k |
| 1659E | AND-MEX Walk | | | 2200 | 2k |
| 1657F | Words on Tree | | | 2600 | 854 |
| 1648E | Air Reform | | | 3200 | 601 |
| 1638C | Inversion Graph | | | 1300 | 16.1k |
| 1635E | Cars | | | 2200 | 2.9k |
| 1633E | Spanning Tree Queries | | | 2400 | 1.8k |
| 1624G | MinOr Tree | | | 1900 | 7.9k |
| 1615D | X(or)-mas Tree | | | 2200 | 2.2k |
| 1609D | Social Network | | | 1600 | 8.6k |
| 1594D | The Number of Imposters | | | 1700 | 9.8k |
| 1574F | Occurrences | | | 2700 | 786 |
| 1567F | One-Four Overload | | | 2700 | 888 |
| 1559D1 | Mocha and Diana (Easy Version) | | | 1400 | 16.5k |
| 1559D2 | Mocha and Diana (Hard Version) | | | 2500 | 3.2k |
| 1555F | Good Graph | | | 2700 | 1.1k |
| 1553E | Permutation Shift | | | 2100 | 3.8k |
| 1553G | Common Divisor Graph | | | 2700 | 1.3k |
| 1550F | Jumping Around | | | 2700 | 958 |
| 1537F | Figure Fixing | | | 2200 | 2.9k |