| 2249D | Xor Permutation Matrix | | | unrated | 672 |
| 2247D1 | XOR Sorting (Easy Version) | | | unrated | 5.5k |
| 2247D2 | XOR Sorting (Hard Version) | | | unrated | 1.9k |
| 2246D | diss_quack and Array Game | | | unrated | 2.8k |
| 2246E | lce4113 and Security Game | | | unrated | 539 |
| 2245C | MEXOR | | | unrated | 6k |
| 2242E | Product of Closures | | | 2200 | 1.4k |
| 2236G | Criterion in Burlandia | | | 2600 | 385 |
| 2234D | XOR, Expression and Two Binary Numbers | | | 1500 | 8.6k |
| 2233E1 | Permutation Transmission (Easy Version) | | | 2200 | 1.2k |
| 2233E2 | Permutation Transmission (Difficult Version) | | | 2300 | 1.1k |
| 2229F | Load Unbalancing | | | 2400 | 1.1k |
| 2225D | Exceptional Segments | | | 1500 | 8.3k |
| 2222E | Seek the Truth | | | 2000 | 2.3k |
| 2219B2 | Unique Values (Hard version) | | | 2000 | 3.8k |
| 2218E | The 67th XOR Problem | | | 1200 | 17.1k |
| 2217F | Interval Game | | | 2300 | 885 |
| 2215C | Oriented Journey | | | 2200 | 819 |
| 2215D | EXPloration, EXPloitation, and Gain Some EXPerience! | | | 2800 | 162 |
| 2214C | And? | | | unrated | 2k |
| 2211D | AND-array | | | 1900 | 3.2k |
| 2205G | Simons and Diophantus Equation | | | 3000 | 231 |
| 2203B | Beautiful Numbers | | | 1000 | 16.2k |
| 2203C | Test Generator | | | 1500 | 7.9k |
| 2200B | Deletion Sort | | | 800 | 27.9k |
| 2196E1 | Fuzzy Concatenation (Easy Version) | | | 2900 | 311 |
| 2196E2 | Fuzzy Concatenation (Hard version) | | | 3000 | 238 |
| 2194C | Secret message | | | 1300 | 11.6k |
| 2194F1 | Again Trees... (Easy Version) | | | 2300 | 967 |
| 2194F2 | Again Trees... (hard version) | | | 3000 | 223 |
| 2190F | Xor Product | | | 3300 | 100 |
| 2189C1 | XOR Convenience (Easy Version) | | | 1300 | 14.7k |
| 2189C2 | XOR-convenience (Hard Version) | | | 1800 | 6.5k |
| 2187B | Shortest Statement Ever | | | 1800 | 5.6k |
| 2187D | Cool Problem | | | 2600 | 707 |
| 2182F1 | Christmas Reindeer (easy version) | | | 2300 | 1.3k |
| 2182F2 | Christmas Reindeer (hard version) | | | 2500 | 1.1k |
| 2180C | XOR-factorization | | | 1900 | 6.7k |
| 2180E | No Effect XOR | | | 2300 | 1.8k |
| 2180G | Balance | | | 3500 | 154 |
| 2179D | Blackslex and Penguin Civilization | | | 1300 | 14.1k |
| 2179H | Blackslex and Plants | | | 2200 | 1.4k |
| 2178G | deCH OR Dations | | | 2800 | 630 |
| 2178H | Create or Duplicate | | | 3300 | 333 |
| 2178I | Numbers or Fireworks | | | 3300 | 265 |
| 2176B | Optimal Shifts | | | 1000 | 23.8k |
| 2176F | Omega Numbers | | | 2400 | 1.6k |
| 2173D | Taiga's Carry Chains | | | 1900 | 3.8k |
| 2171C1 | Renako Amaori and XOR Game (easy version) | | | 1100 | 20k |
| 2171C2 | Renako Amaori and XOR Game (hard version) | | | 1400 | 12.4k |
| 2171G | Sakura Adachi and Optimal Sequences | | | 2000 | 2.4k |
| 2170A | Maximum Neighborhood | | | 800 | 20.6k |
| 2170F | Build XOR on a Segment | | | 2600 | 834 |
| 2168A2 | Encode and Decode (Hard Version) | | | unrated | 3.5k |
| 2168C | Intercepting Butterflies | | | unrated | 912 |
| 2165C | Binary Wine | | | 2000 | 5k |
| 2163E | Plegma | | | 2700 | 676 |
| 2162C | Beautiful XOR | | | 1100 | 22.2k |
| 2161G | Bitwise And Equals | | | 3500 | 99 |
| 2160C | Reverse XOR | | | 1300 | 15.7k |
| 2157G | Isaac's Queries | | | 2800 | 672 |
| 2156D | Find the Last Number | | | 1900 | 5.5k |
| 2153B | Bitwise Reversion | | | 800 | 23.2k |
| 2153F | Odd Queries on Odd Array | | | 2900 | 337 |
| 2147E | Maximum OR Popcount | | | 2300 | 2.2k |
| 2146D1 | Max Sum OR (Easy Version) | | | 1500 | 11.2k |
| 2146D2 | Max Sum OR (Hard Version) | | | 2000 | 4.3k |
| 2143F | Increasing Xor | | | 2700 | 454 |
| 2140E1 | Prime Gaming (Easy Version) | | | 2200 | 2.2k |
| 2140E2 | Prime Gaming (Hard Version) | | | 2500 | 1.3k |
| 2138A | Cake Assignment | | | 1100 | 17.7k |
| 2138C2 | Maple and Tree Beauty (Hard Version) | | | 2000 | 3.6k |
| 2135C | By the Assignment | | | 2000 | 5.4k |
| 2131G | Wafu! | | | 2000 | 3.9k |
| 2129C1 | Interactive RBS (Easy Version) | | | 1900 | 4.5k |
| 2129C2 | Interactive RBS (Medium Version) | | | 2000 | 3.2k |
| 2129C3 | Interactive RBS (Hard Version) | | | 2300 | 1.9k |
| 2127G2 | Inter Active (Hard Version) | | | 3500 | 126 |
| 2125C | Count Good Numbers | | | 1100 | 23.3k |
| 2119A | Add or XOR | | | 800 | 27.7k |
| 2119C | A Good Problem | | | 1300 | 16.8k |
| 2119E | And Constraint | | | 2600 | 732 |
| 2118C | Make It Beautiful | | | 1300 | 19k |
| 2115D | Gellyfish and Forget-Me-Not | | | 2900 | 2.1k |
| 2111G | Divisible Subarrays | | | 2900 | 422 |
| 2109B | Slice to Survive | | | 1200 | 17.8k |
| 2109C1 | Hacking Numbers (Easy Version) | | | 1500 | 11.8k |
| 2108B | SUMdamental Decomposition | | | 1300 | 14.9k |
| 2103F | Maximize Nor | | | 2600 | 634 |
| 2097D | Homework | | | 2800 | 559 |
| 2096G | Wonderful Guessing Game | | | 3200 | 451 |
| 2096H | Wonderful XOR Problem | | | 3200 | 235 |
| 2094E | Boneca Ambalabu | | | 1200 | 19k |
| 2093D | Skibidi Table | | | 1400 | 12.5k |
| 2093F | Hackers and Neural Networks | | | 1800 | 6k |
| 2093G | Shorten the Array | | | 1900 | 4k |
| 2086E | Zebra-like Numbers | | | 2400 | 1.7k |
| 2085C | Serval and The Formula | | | 1600 | 14k |
| 2081A | Math Division | | | 1800 | 4.2k |
| 2081C | Quaternary Matrix | | | 2700 | 372 |