| 1285C | Fadi and LCM | | | 1400 | 28.8k |
| 1285D | Dr. Evil Underscores | | | 1900 | 8.8k |
| 1285E | Delete a Segment | | | 2300 | 2k |
| 1285F | Classical? | | | 2900 | 1.4k |
| 1284A | New Year and Naming | | | 800 | 18.6k |
| 1284B | New Year and Ascent Sequence | | | 1400 | 11.6k |
| 1284C | New Year and Permutation | | | 1600 | 8.8k |
| 1284D | New Year and Conference | | | 2100 | 3.4k |
| 1284E | New Year and Castle Construction | | | 2500 | 1.4k |
| 1284F | New Year and Social Network | | | 3200 | 424 |
| 1284G | Seollal | | | 3300 | 241 |
| 1283A | Minutes Before the New Year | | | 800 | 62.2k |
| 1283B | Candies Division | | | 900 | 23.2k |
| 1283C | Friends and Gifts | | | 1500 | 14.3k |
| 1283D | Christmas Trees | | | 1800 | 10k |
| 1283E | New Year Parties | | | 1800 | 7.5k |
| 1283F | DIY Garland | | | 2200 | 2.2k |
| 1282A | Temporarily unavailable | | | 900 | 15.5k |
| 1282B1 | K for the Price of One (Easy Version) | | | 1400 | 12.2k |
| 1282B2 | K for the Price of One (Hard Version) | | | 1600 | 11.2k |
| 1282C | Petya and Exam | | | 1800 | 4.7k |
| 1282D | Enchanted Artifact | | | 2300 | 2.5k |
| 1282E | The Cake Is a Lie | | | 2400 | 1.2k |
| 1281A | Suffix Three | | | 800 | 19k |
| 1281B | Azamon Web Services | | | 1600 | 8.7k |
| 1280A | Cut and Paste | | | 1700 | 5.9k |
| 1280B | Beingawesomeism | | | 1800 | 4.2k |
| 1280C | Jeremy Bearimy | | | 2000 | 3.1k |
| 1280D | Miss Punyverse | | | 2500 | 1.3k |
| 1280E | Kirchhoff's Current Loss | | | 2900 | 251 |
| 1280F | Intergalactic Sliding Puzzle | | | 3400 | 114 |
| 1279A | New Year Garland | | | 900 | 18k |
| 1279B | Verse For Santa | | | 1300 | 14.5k |
| 1279C | Stack of Presents | | | 1400 | 12.5k |
| 1279D | Santa's Bot | | | 1700 | 7.5k |
| 1279E | New Year Permutations | | | 2700 | 483 |
| 1279F | New Year and Handle Change | | | 2800 | 1.3k |
| 1278A | Shuffle Hashing | | | 1000 | 18.5k |
| 1278B | A and B | | | 1500 | 14.3k |
| 1278C | Berry Jam | | | 1700 | 8.8k |
| 1278D | Segment Tree | | | 2100 | 4.4k |
| 1278E | Tests for problem D | | | 2200 | 2.1k |
| 1278F | Cards | | | 2600 | 2.7k |
| 1277A | Happy Birthday, Polycarp! | | | 1000 | 14.6k |
| 1277B | Make Them Odd | | | 1200 | 17.3k |
| 1277D | Let's Play the Words? | | | 1900 | 3.3k |
| 1276A | As Simple as One and Two | | | 1400 | 13k |
| 1276B | Two Fairs | | | 1900 | 5.7k |
| 1276C | Beautiful Rectangle | | | 2300 | 1.8k |
| 1276D | Tree Elimination | | | 2900 | 725 |
| 1276E | Four Stones | | | 3500 | 126 |
| 1276F | Asterisk Substrings | | | 3400 | 594 |
| 1275A | Скрытый друг | | | unrated | 892 |
| 1275B | Code Review | | | unrated | 847 |
| 1275C | #define Задача B ... | | | unrated | 699 |
| 1275D | Storage2 | | | unrated | 422 |
| 1275E1 | Контрольная сумма | | | unrated | 265 |
| 1275E2 | Контрольная сумма | | | unrated | 138 |
| 1275E3 | Контрольная сумма | | | unrated | 61 |
| 1275F | Шардирование постов | | | unrated | 93 |
| 1272A | Three Friends | | | 900 | 22.2k |
| 1272B | Snow Walking Robot | | | 1200 | 14.7k |
| 1272C | Yet Another Broken Keyboard | | | 1200 | 31.3k |
| 1272D | Remove One Element | | | 1500 | 19.6k |
| 1272E | Nearest Opposite Parity | | | 1900 | 8.3k |
| 1272F | Two Bracket Sequences | | | 2200 | 2.4k |
| 1271A | Suits | | | 800 | 15.7k |
| 1271B | Blocks | | | 1300 | 12.1k |
| 1271C | Shawarma Tent | | | 1300 | 11.2k |
| 1271D | Portals | | | 2100 | 3.5k |
| 1271E | Common Number | | | 2100 | 3.8k |
| 1271F | Divide The Students | | | 2700 | 318 |
| 1270A | Card Game | | | 800 | 17.9k |
| 1270B | Interesting Subarray | | | 1200 | 17.5k |
| 1270C | Make Good | | | 1400 | 15.2k |
| 1270D | Strange Device | | | 1900 | 5k |
| 1270E | Divide Points | | | 2300 | 2.8k |
| 1270F | Awesome Substrings | | | 2600 | 1.4k |
| 1270G | Subset with Zero Sum | | | 2700 | 3.1k |
| 1270H | Number of Components | | | 3300 | 1k |
| 1270I | Xor on Figures | | | 3500 | 407 |
| 1269A | Equation | | | 800 | 24.4k |
| 1269B | Modulo Equality | | | 1500 | 9.7k |
| 1268A | Long Beautiful Integer | | | 1700 | 9.2k |
| 1268B | Domino for Young | | | 2000 | 6.5k |
| 1268C | K Integers | | | 2300 | 2k |
| 1268D | Invertation in Tournament | | | 3200 | 873 |
| 1268E | Happy Cactus | | | 3400 | 320 |
| 1267A | Apprentice Learning Trajectory | | | 2400 | 1.1k |
| 1267B | Balls of Buma | | | 900 | 4.7k |
| 1267C | Cactus Revenge | | | 3500 | 393 |
| 1267D | DevOps Best Practices | | | 2800 | 286 |
| 1267E | Elections | | | 1700 | 3.6k |
| 1267F | Foolprüf Security | | | 2600 | 723 |
| 1267G | Game Relics | | | 3000 | 846 |
| 1267H | Help BerLine | | | 3200 | 237 |
| 1267I | Intriguing Selection | | | 2600 | 1.1k |
| 1267J | Just Arrange the Icons | | | 1800 | 3.1k |
| 1267K | Key Storage | | | 2100 | 2.2k |
| 1267L | Lexicography | | | 1800 | 3.4k |