| 1209E2 | Rotate Columns (hard version) | | | 2500 | 2.4k |
| 1208F | Bits And Pieces | | | 2600 | 3.5k |
| 1207E | XOR Guessing | | | 1900 | 6.7k |
| 1205B | Shortest Cycle | | | 1900 | 7.6k |
| 1202A | You Are Given Two Binary Strings... | | | 1100 | 10.9k |
| 1194E | Count The Rectangles | | | 2200 | 2.1k |
| 1185F | Two Pizzas | | | 2100 | 2.3k |
| 1185G1 | Playlist for Polycarp (easy version) | | | 2100 | 3.3k |
| 1174D | Ehab and the Expected XOR Problem | | | 1900 | 5.1k |
| 1168C | And Reachability | | | 2200 | 2.8k |
| 1166E | The LCMs Must be Large | | | 2100 | 3k |
| 1163E | Magical Permutation | | | 2400 | 1.1k |
| 1152B | Neko Performs Cat Furrier Transform | | | 1300 | 9.4k |
| 1152F1 | Neko Rules the Catniverse (Small Version) | | | 2800 | 836 |
| 1152F2 | Neko Rules the Catniverse (Large Version) | | | 3000 | 1.1k |
| 1151B | Dima and a Bad XOR | | | 1600 | 13.1k |
| 1148F | Foo Fighters | | | 2700 | 1.2k |
| 1146C | Tree Diameter | | | 1700 | 4.3k |
| 1146E | Hot is Cold | | | 2400 | 1.1k |
| 1145C | Mystery Circuit | | | unrated | 837 |
| 1144E | Median String | | | 1900 | 4.5k |
| 1117E | Decypher the String | | | 2200 | 1.7k |
| 1117F | Crisp String | | | 2500 | 704 |
| 1114F | Please, another Queries on Array? | | | 2400 | 2.6k |
| 1105E | Helping Hiasat | | | 2200 | 2k |
| 1103D | Professional layer | | | 3100 | 555 |
| 1102F | Elongated Matrix | | | 2000 | 2.4k |
| 1097B | Petr and a Combination Lock | | | 1200 | 37.1k |
| 1097F | Alex and a TV Show | | | 2500 | 1.5k |
| 1097H | Mateusz and an Infinite Sequence | | | 3400 | 250 |
| 1095C | Powers Of Two | | | 1400 | 20.1k |
| 1093G | Multidimensional Queries | | | 2300 | 2.3k |
| 1088D | Ehab and another another xor problem | | | 2000 | 3.2k |
| 1073E | Segment Sum | | | 2300 | 3.8k |
| 1051D | Bicolorings | | | 1700 | 8.3k |
| 1043F | Make It One | | | 2500 | 3.1k |
| 1042B | Vitamins | | | 1200 | 19.6k |
| 1038E | Maximum Matching | | | 2400 | 1.1k |
| 1036G | Sources and Sinks | | | 2700 | 472 |
| 1034E | Little C Loves 3 III | | | 3200 | 819 |
| 1033F | Boolean Computer | | | 2800 | 500 |
| 1030E | Vasya and Good Sequences | | | 2000 | 3.4k |
| 1027G | X-mouse in the Campus | | | 2600 | 386 |
| 1017D | The Wu | | | 1900 | 4.1k |
| 1016G | Appropriate Team | | | 2700 | 364 |
| 1009G | Allowed Letters | | | 2400 | 1.1k |
| 1007B | Pave the Parallelepiped | | | 2400 | 1.1k |
| 1006F | Xor-Paths | | | 2100 | 7.2k |
| 1004F | Sonya and Bitwise OR | | | 2600 | 985 |
| 993B | Open Communication | | | 1900 | 2.1k |
| 993C | Careful Maneuvering | | | 2100 | 1.8k |
| 986C | AND Graph | | | 2500 | 2.8k |
| 981D | Bookshelves | | | 1900 | 3.6k |
| 981E | Addition on Segments | | | 2200 | 2.6k |
| 979D | Kuro and GCD and XOR and SUM | | | 2200 | 2.3k |
| 961C | Chessboard | | | 1400 | 5.7k |
| 960C | Subsequence Counting | | | 1700 | 4.2k |
| 959E | Mahmoud and Ehab and the xor-MST | | | 1900 | 3.8k |
| 959F | Mahmoud and Ehab and yet another xor task | | | 2400 | 3k |
| 938F | Erasing Substrings | | | 2700 | 673 |
| 938G | Shortest Path Queries | | | 2900 | 1.2k |
| 920G | List Of Integers | | | 2200 | 2.1k |
| 916B | Jamie and Binary Sequence (changed after round) | | | 2000 | 2k |
| 914E | Palindromes in a Tree | | | 2400 | 2k |
| 914F | Substrings in a String | | | 3000 | 2.5k |
| 914G | Sum the Fibonacci | | | 2600 | 1.3k |
| 913C | Party Lemonade | | | 1600 | 8.5k |
| 913E | Logical Expression | | | 2400 | 905 |
| 912B | New Year's Eve | | | 1300 | 14.2k |
| 908E | New Year and Entity Enumeration | | | 2500 | 871 |
| 906C | Party | | | 2400 | 1.6k |
| 903F | Clear The Matrix | | | 2200 | 795 |
| 900D | Unusual Sequences | | | 2000 | 3.9k |
| 895C | Square Subsets | | | 2000 | 7.6k |
| 888E | Maximum Subsequence | | | 1800 | 9.6k |
| 888G | Xor-MST | | | 2300 | 6.1k |
| 878A | Short Program | | | 1600 | 6k |
| 878D | Magic Breeding | | | 2900 | 927 |
| 877E | Danil and a Part-time Job | | | 2000 | 5.8k |
| 875D | High Cry | | | 2200 | 2.6k |
| 868C | Qualification Rounds | | | 1500 | 5.1k |
| 868D | Huge Strings | | | 2200 | 1k |
| 865E | Hex Dyslexia | | | 3300 | 162 |
| 865F | Egg Roulette | | | 3300 | 81 |
| 855E | Salazar Slytherin's Locket | | | 2200 | 2.2k |
| 850C | Arpa and a game with Mojtaba | | | 2200 | 2k |
| 850E | Random Elections | | | 2800 | 570 |
| 845F | Guards In The Storehouse | | | 2500 | 696 |
| 817E | Choosing The Commander | | | 2000 | 3.9k |
| 812B | Sagheer, the Hausmeister | | | 1600 | 5.6k |
| 803F | Coprime Subsequences | | | 2000 | 5k |
| 796F | Sequence Recovery | | | 2800 | 451 |
| 792D | Paths in a Complete Binary Tree | | | 1900 | 3.5k |
| 780F | Axel and Marston in Bitland | | | 2400 | 1.3k |
| 778B | Bitwise Formula | | | 1800 | 2.5k |
| 776G | Sherlock and the Encrypted Data | | | 2900 | 410 |
| 772D | Varying Kibibits | | | 2700 | 859 |
| 769D | k-Interesting Pairs Of Integers | | | 1700 | 2.6k |
| 768E | Game of Stones | | | 2100 | 3.7k |
| 766E | Mahmoud and a xor trip | | | 2100 | 3.6k |