| 1630C | Paint the Middle | | | 2200 | 3.4k |
| 1630D | Flipping Range | | | 2400 | 2.1k |
| 1630E | Expected Components | | | 2900 | 621 |
| 1630F | Making It Bipartite | | | 3400 | 984 |
| 1629A | Download More RAM | | | 800 | 31.1k |
| 1629B | GCD Arrays | | | 800 | 25.5k |
| 1628A | Meximum Array | | | 1400 | 17.2k |
| 1628B | Peculiar Movie Preferences | | | 1700 | 12.8k |
| 1628C | Grid Xor | | | 2300 | 3.6k |
| 1628D1 | Game on Sum (Easy Version) | | | 2100 | 3.8k |
| 1628D2 | Game on Sum (Hard Version) | | | 2400 | 2.7k |
| 1628E | Groceries in Meteor Town | | | 3100 | 1.3k |
| 1628F | Spaceship Crisis Management | | | 3500 | 114 |
| 1627A | Not Shading | | | 800 | 25k |
| 1627B | Not Sitting | | | 1300 | 17.7k |
| 1627C | Not Assigning | | | 1400 | 16.4k |
| 1627D | Not Adding | | | 1900 | 9.5k |
| 1627E | Not Escaping | | | 2200 | 2.9k |
| 1627F | Not Splitting | | | 2700 | 691 |
| 1626A | Equidistant Letters | | | 800 | 31.1k |
| 1626B | Minor Reduction | | | 1100 | 24.1k |
| 1626C | Monsters And Spells | | | 1700 | 12k |
| 1626D | Martial Arts Tournament | | | 2100 | 4.4k |
| 1626E | Black and White Tree | | | 2400 | 1.9k |
| 1626F | A Random Code Problem | | | 2800 | 927 |
| 1625A | Ancient Civilization | | | 800 | 18.4k |
| 1625B | Elementary Particles | | | 1100 | 16.9k |
| 1625C | Road Optimization | | | 1700 | 13.7k |
| 1625D | Binary Spiders | | | 2300 | 2.4k |
| 1625E1 | Cats on the Upgrade (easy version) | | | 2500 | 1.2k |
| 1625E2 | Cats on the Upgrade (hard version) | | | 2800 | 706 |
| 1624A | Plus One on the Subset | | | 800 | 61.1k |
| 1624B | Make AP | | | 900 | 55.8k |
| 1624C | Division by Two and Permutation | | | 1100 | 27.1k |
| 1624D | Palindromes Coloring | | | 1400 | 19.3k |
| 1624E | Masha-forgetful | | | 2000 | 4.7k |
| 1624F | Interacdive Problem | | | 2000 | 3.9k |
| 1624G | MinOr Tree | | | 1900 | 7.9k |
| 1623A | Robot Cleaner | | | 800 | 20.8k |
| 1623B | Game on Ranges | | | 1100 | 14.7k |
| 1623C | Balanced Stone Heaps | | | 1600 | 14.5k |
| 1623D | Robot Cleaner Revisit | | | 2300 | 1.5k |
| 1623E | Middle Duplication | | | 2500 | 1.3k |
| 1622A | Construct a Rectangle | | | 800 | 32.2k |
| 1622B | Berland Music | | | 1000 | 22.4k |
| 1622C | Set or Decrease | | | 1600 | 15.8k |
| 1622D | Shuffle | | | 2000 | 4.8k |
| 1622E | Math Test | | | 2200 | 2.3k |
| 1622F | Quadratic Set | | | 2900 | 956 |
| 1621A | Stable Arrangement of Rooks | | | 800 | 24.8k |
| 1621B | Integers Shop | | | 1500 | 14.6k |
| 1621C | Hidden Permutations | | | 1700 | 7.6k |
| 1621D | The Winter Hike | | | 2100 | 4.4k |
| 1621E | New School | | | 2300 | 2k |
| 1621F | Strange Instructions | | | 2700 | 662 |
| 1621G | Weighted Increasing Subsequences | | | 3200 | 901 |
| 1621H | Trains and Airplanes | | | 3500 | 267 |
| 1621I | Two Sequences | | | 3500 | 150 |
| 1620A | Equal or Not Equal | | | 800 | 23.3k |
| 1620B | Triangles on a Rectangle | | | 1000 | 33.4k |
| 1620C | BA-String | | | 1800 | 7.3k |
| 1620D | Exact Change | | | 2000 | 4.9k |
| 1620E | Replace the Numbers | | | 1900 | 9.9k |
| 1620F | Bipartite Array | | | 2800 | 805 |
| 1620G | Subsequences Galore | | | 2400 | 1.2k |
| 1619A | Square String? | | | 800 | 63.8k |
| 1619B | Squares and Cubes | | | 800 | 33.2k |
| 1619C | Wrong Addition | | | 1200 | 22.9k |
| 1619D | New Year's Problem | | | 1800 | 8.7k |
| 1619E | MEX and Increments | | | 1700 | 10.3k |
| 1619F | Let's Play the Hat? | | | 2000 | 2.4k |
| 1619G | Unusual Minesweeper | | | 2000 | 2.8k |
| 1619H | Permutation and Queries | | | 2400 | 1.5k |
| 1618A | Polycarp and Sums of Subsequences | | | 800 | 34.8k |
| 1618B | Missing Bigram | | | 800 | 23.9k |
| 1618C | Paint the Array | | | 1100 | 34.2k |
| 1618D | Array and Operations | | | 1300 | 21.1k |
| 1618E | Singers' Tour | | | 1700 | 7.8k |
| 1618F | Reverse | | | 2000 | 4.8k |
| 1618G | Trader Problem | | | 2200 | 2k |
| 1617A | Forbidden Subsequence | | | 800 | 17.1k |
| 1617B | GCD Problem | | | 900 | 27.3k |
| 1617C | Paprika and Permutation | | | 1300 | 16.1k |
| 1617D1 | Too Many Impostors (easy version) | | | 1800 | 5.2k |
| 1617D2 | Too Many Impostors (hard version) | | | 2400 | 2.1k |
| 1617E | Christmas Chocolates | | | 2700 | 1.1k |
| 1616A | Integer Diversity | | | 800 | 24k |
| 1616B | Mirror in the String | | | 1100 | 20.8k |
| 1616C | Representative Edges | | | 1500 | 13.3k |
| 1616D | Keep the Average High | | | 2000 | 5.7k |
| 1616E | Lexicographically Small Enough | | | 2200 | 2.8k |
| 1616F | Tricolor Triangles | | | 2900 | 767 |
| 1616G | Just Add an Edge | | | 3500 | 472 |
| 1616H | Keep XOR Low | | | 3000 | 1.4k |
| 1615A | Closing The Gap | | | 800 | 21.7k |
| 1615B | And It's Non-Zero | | | 1300 | 18.1k |
| 1615C | Menorah | | | 1600 | 9.3k |
| 1615D | X(or)-mas Tree | | | 2200 | 2.2k |
| 1615E | Purple Crayon | | | 2400 | 1.8k |
| 1615F | LEGOndary Grandmaster | | | 2800 | 1.2k |