| 2069F | Graph Inclusion | | | 2800 | 824 |
| 2068E | Porto Vs. Benfica | | | 2800 | 384 |
| 2067C | Devyatkino | | | 1500 | 13k |
| 2065F | Skibidus and Slay | | | 1700 | 7.3k |
| 2063C | Remove Exactly Two | | | 1600 | 15.1k |
| 2063E | Triangle Tree | | | 2300 | 2.4k |
| 2063F1 | Counting Is Not Fun (Easy Version) | | | 2400 | 1.6k |
| 2063F2 | Counting Is Not Fun (Hard Version) | | | 2700 | 951 |
| 2062D | Balanced Tree | | | 2200 | 3.6k |
| 2062E1 | The Game (Easy Version) | | | 2000 | 4.4k |
| 2062E2 | The Game (Hard Version) | | | 3000 | 464 |
| 2060E | Graph Composition | | | 1500 | 12.7k |
| 2057E2 | Another Exercise on Graphs (hard version) | | | 2500 | 2k |
| 2057G | Secret Message | | | 3000 | 764 |
| 2056B | Find the Permutation | | | 1300 | 18.2k |
| 2056E | Nested Segments | | | 2500 | 1.1k |
| 2053E | Resourceful Caterpillar Sequence | | | 1900 | 4.6k |
| 2050G | Tree Destruction | | | 1900 | 5.5k |
| 2045M | Mirror Maze | | | 1800 | 2.3k |
| 2044G1 | Medium Demon Problem (easy version) | | | 1700 | 7.6k |
| 2044G2 | Medium Demon Problem (hard version) | | | 1900 | 4k |
| 2043E | Matrix Transformation | | | 2300 | 1.9k |
| 2042E | Vertex Pairs | | | 2900 | 535 |
| 2041C | Cube | | | 2000 | 2.1k |
| 2041D | Drunken Maze | | | 1700 | 5.3k |
| 2041F | Segmentation Folds | | | 2400 | 520 |
| 2041K | Trophic Balance Species | | | 3100 | 122 |
| 2040D | Non Prime Tree | | | 1900 | 5.9k |
| 2040E | Control of Randomness | | | 2100 | 2.8k |
| 2035F | Tree Operations | | | 2500 | 1.1k |
| 2034C | Trapped in the Witch's Labyrinth | | | 1400 | 9.4k |
| 2034H | Rayan vs. Rayaneh | | | 3300 | 199 |
| 2033E | Sakurako, Kosuke, and the Permutation | | | 1400 | 14.5k |
| 2033G | Sakurako and Chefir | | | 2200 | 2k |
| 2031D | Penchick and Desert Rabbit | | | 1700 | 10.1k |
| 2031E | Penchick and Chloe's Trees | | | 2100 | 2.8k |
| 2029D | Cool Graph | | | 1900 | 4k |
| 2028E | Alice's Adventures in the Rabbit Hole | | | 2300 | 2k |
| 2027C | Add Zeros | | | 1500 | 14.1k |
| 2026E | Best Subsequence | | | 2500 | 2.1k |
| 2026F | Bermart Ice Cream | | | 2700 | 413 |
| 2025F | Choose Your Queries | | | 2700 | 1.1k |
| 2023C | C+K+S | | | 2400 | 1.4k |
| 2022E1 | Billetes MX (Easy Version) | | | 2500 | 780 |
| 2021E1 | Digital Village (Easy Version) | | | 2300 | 2k |
| 2021E3 | Digital Village (Extreme Version) | | | 2800 | 725 |
| 2018C | Tree Pruning | | | 1700 | 10.2k |
| 2014E | Rendez-vous de Marian et Robin | | | 1800 | 9.2k |
| 2014F | Sheriff's Defense | | | 2000 | 5.3k |
| 2006A | Iris and Game on the Tree | | | 1700 | 9.8k |
| 2006B | Iris and the Tree | | | 1800 | 4.4k |
| 2006E | Iris's Full Binary Tree | | | 3100 | 328 |
| 2003D2 | Turtle and a MEX Problem (Hard Version) | | | 2100 | 4.7k |
| 2002D1 | DFS Checker (Easy Version) | | | 1900 | 5.2k |
| 2002D2 | DFS Checker (Hard Version) | | | 2300 | 2.9k |
| 2002F1 | Court Blue (Easy Version) | | | 2600 | 1k |
| 2001C | Guess The Tree | | | 1500 | 13.1k |
| 1997D | Maximize the Root | | | 1500 | 16.3k |
| 1994F | Stardew Valley | | | 2500 | 1.6k |
| 1991E | Coloring Game | | | 1900 | 5.2k |
| 1990E1 | Catch the Mole(Easy Version) | | | 2500 | 1.2k |
| 1990E2 | Catch the Mole(Hard Version) | | | 2600 | 1.2k |
| 1989F | Simultaneous Coloring | | | 3000 | 620 |
| 1988D | The Omnipotent Monster Killer | | | 2000 | 6.1k |
| 1987E | Wonderful Tree! | | | 2000 | 4.2k |
| 1986F | Non-academic Problem | | | 1900 | 6.7k |
| 1985H1 | Maximize the Largest Component (Easy Version) | | | 1700 | 7.4k |
| 1985H2 | Maximize the Largest Component (Hard Version) | | | 2200 | 2k |
| 1981D | Turtle and Multiplication | | | 2400 | 2.2k |
| 1980G | Yasya and the Mysterious Tree | | | 2300 | 1.8k |
| 1978F | Large Graph | | | 2400 | 1.6k |
| 1976E | Splittable Permutations | | | 2500 | 1.3k |
| 1976F | Remove Bridges | | | 2800 | 893 |
| 1975D | Paint the Tree | | | 1700 | 7.6k |
| 1975E | Chain Queries | | | 2100 | 2.9k |
| 1975F | Set | | | 2600 | 1.1k |
| 1971F | Circle Perimeter | | | 1600 | 12.7k |
| 1971H | ±1 | | | 2100 | 2.9k |
| 1970C2 | Game on Tree (Medium) | | | 1700 | 4.5k |
| 1970C3 | Game on Tree (Hard) | | | 1900 | 2.5k |
| 1970G1 | Min-Fund Prison (Easy) | | | 1900 | 2k |
| 1970G2 | Min-Fund Prison (Medium) | | | 2200 | 907 |
| 1970G3 | Min-Fund Prison (Hard) | | | 2400 | 574 |
| 1968D | Permutation Game | | | 1300 | 17.7k |
| 1967D | Long Way to be Non-decreasing | | | 2800 | 998 |
| 1957F2 | Frequency Mismatch (Hard Version) | | | 2700 | 659 |
| 1955G | GCD on a grid | | | 1900 | 6.1k |
| 1952G | Mathematician Takeover | | | unrated | 1.2k |
| 1950G | Shuffling Songs | | | 1900 | 6.3k |
| 1949A | Grove | | | 3300 | 223 |
| 1949C | Annual Ants' Gathering | | | 1900 | 2.6k |
| 1949I | Disks | | | 1800 | 2.8k |
| 1948C | Arrow Path | | | 1300 | 21.5k |
| 1946F | Nobody is needed | | | 2500 | 1.3k |
| 1943C | Tree Compass | | | 2300 | 2.7k |
| 1942D | Learning to Paint | | | 2100 | 3.4k |
| 1941D | Rudolf and the Ball Game | | | 1200 | 21.3k |
| 1941G | Rudolf and Subway | | | 2000 | 4.8k |
| 1940A | Parallel Universes | | | unrated | 106 |
| 1940C | Burenka and Pether | | | unrated | 44 |