| 916B | Jamie and Binary Sequence (changed after round) | | | 2000 | 2k |
| 915G | Coprime Arrays | | | 2300 | 1.5k |
| 914A | Perfect Squares | | | 900 | 15.9k |
| 914G | Sum the Fibonacci | | | 2600 | 1.3k |
| 913A | Modular Exponentiation | | | 900 | 24.5k |
| 913F | Strongly Connected Tournament | | | 2800 | 816 |
| 913G | Power Substring | | | 3200 | 267 |
| 913H | Don't Exceed | | | 3400 | 209 |
| 912E | Prime Gift | | | 2400 | 2.1k |
| 911D | Inversion Counting | | | 1800 | 5.2k |
| 910C | Minimum Sum | | | 1700 | 2.2k |
| 909B | Segments | | | 1300 | 6.8k |
| 908C | New Year and Curling | | | 1500 | 7.3k |
| 908D | New Year and Arbitrary Arrangement | | | 2200 | 2.7k |
| 908E | New Year and Entity Enumeration | | | 2500 | 871 |
| 908G | New Year and Original Order | | | 2800 | 1.7k |
| 906B | Seating of Students | | | 2200 | 1.3k |
| 906D | Power Tower | | | 2700 | 2.8k |
| 903D | Almost Difference | | | 2200 | 4.5k |
| 901B | GCD of Polynomials | | | 2200 | 1.7k |
| 901E | Cyclic Cipher | | | 3300 | 106 |
| 900B | Position in Fraction | | | 1300 | 8.4k |
| 900C | Remove Extra One | | | 1700 | 5k |
| 900D | Unusual Sequences | | | 2000 | 3.9k |
| 899A | Splitting in Teams | | | 800 | 11.2k |
| 899C | Dividing the numbers | | | 1300 | 9.1k |
| 899D | Shovel Sale | | | 1800 | 3.3k |
| 898A | Rounding | | | 800 | 17.7k |
| 898F | Restoring the Expression | | | 2300 | 1.5k |
| 896D | Nephren Runs a Cinema | | | 2900 | 706 |
| 895B | XK Segments | | | 1700 | 3.8k |
| 895C | Square Subsets | | | 2000 | 7.7k |
| 895D | String Mark | | | 2100 | 1.3k |
| 894B | Ralph And His Magic Field | | | 1800 | 4.7k |
| 894C | Marco and GCD Sequence | | | 1900 | 4.7k |
| 893E | Counting Arrays | | | 2000 | 4.3k |
| 891A | Pride | | | 1500 | 15k |
| 891E | Lust | | | 3000 | 1.3k |
| 889E | Mod Mod Mod | | | 3000 | 743 |
| 888D | Almost Identity Permutations | | | 1600 | 10.8k |
| 886E | Maximum Element | | | 2400 | 1.3k |
| 884C | Bertown Subway | | | 1500 | 5.2k |
| 883D | Packmen Strike Back | | | 2500 | 505 |
| 883M | Quadcopter Competition | | | 1100 | 3.9k |
| 876A | Trip For Meal | | | 900 | 10.1k |
| 876B | Divisiblity of Differences | | | 1300 | 10.4k |
| 875A | Classroom Watch | | | 1200 | 10.3k |
| 870C | Maximum splitting | | | 1300 | 9.8k |
| 869B | The Eternal Immortality | | | 1100 | 15.8k |
| 869C | The Intriguing Obsession | | | 1800 | 5.3k |
| 868G | El Toll Caves | | | 3300 | 186 |
| 865F | Egg Roulette | | | 3300 | 81 |
| 865G | Flowers and Chocolate | | | 3300 | 282 |
| 864C | Bus | | | 1500 | 6.2k |
| 864D | Make a Permutation! | | | 1500 | 6.4k |
| 859B | Lazy Security Guard | | | 1000 | 8k |
| 859G | Circle of Numbers | | | 3000 | 258 |
| 858A | k-rounding | | | 1100 | 9.4k |
| 856C | Eleventh Birthday | | | 2400 | 752 |
| 854A | Fraction | | | 800 | 14.7k |
| 854B | Maxim Buys an Apartment | | | 1200 | 8.6k |
| 852A | Digits | | | 2500 | 445 |
| 852F | Product transformation | | | 2200 | 669 |
| 851A | Arpa and a research in Mexican wave | | | 800 | 10.3k |
| 851B | Arpa and an exam about geometry | | | 1400 | 5.9k |
| 850A | Five Dimensional Points | | | 1700 | 3.4k |
| 850D | Tournament Construction | | | 2800 | 498 |
| 850E | Random Elections | | | 2800 | 570 |
| 850F | Rainbow Balls | | | 2800 | 847 |
| 848E | Days of Floral Colours | | | 3400 | 283 |
| 847I | Noise Level | | | 1900 | 1.7k |
| 847M | Weather Tomorrow | | | 1000 | 6.9k |
| 846F | Random Query | | | 1800 | 2.7k |
| 845G | Shortest Path Problem? | | | 2300 | 2.2k |
| 844B | Rectangles | | | 1300 | 9.3k |
| 843A | Sorting by Subsequences | | | 1400 | 6k |
| 843C | Upgrading Tree | | | 2600 | 416 |
| 842C | Ilya And The Tree | | | 2000 | 3.8k |
| 841B | Godsend | | | 1100 | 13.3k |
| 840A | Leha and Function | | | 1300 | 7.6k |
| 839D | Winter is here | | | 2200 | 3.7k |
| 839E | Mother of Dragons | | | 2700 | 1.1k |
| 838D | Airplane Arrangements | | | 2700 | 1.2k |
| 837D | Round Subset | | | 2100 | 8k |
| 837E | Vasya's Function | | | 2100 | 2.2k |
| 837F | Prefix Sums | | | 2400 | 1.1k |
| 835A | Key races | | | 800 | 21.9k |
| 833A | The Meaningless Game | | | 1700 | 6.6k |
| 833C | Ever-Hungry Krakozyabra | | | 2700 | 527 |
| 832A | Sasha and Sticks | | | 800 | 22.3k |
| 832C | Strange Radiation | | | 2500 | 509 |
| 830C | Bamboo Partition | | | 2300 | 1.3k |
| 830E | Perpetual Motion Machine | | | 3100 | 373 |
| 827E | Rusty String | | | 2700 | 1.3k |
| 822A | I'm bored with life | | | 800 | 37.4k |
| 822D | My pretty girl Noora | | | 1800 | 3.3k |
| 821B | Okabe and Banana Trees | | | 1300 | 6.1k |
| 820B | Mister B and Angle in Polygon | | | 1300 | 5.5k |
| 819B | Mister B and PR Shifts | | | 1900 | 1.8k |
| 818A | Diplomas and Certificates | | | 800 | 7.9k |