| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 4086 | P822A I'm bored with life | 0 / 0 | (None) | |
| 4085 | P822B Crossword solving | 0 / 0 | (None) | |
| 4084 | P822C Hacker, pack your bags! | 0 / 0 | (None) | |
| 4080 | P825A Binary Protocol | 0 / 0 | (None) | |
| 4079 | P825B Five-In-a-Row | 0 / 0 | (None) | |
| 4078 | P825C Multi-judge Solving | 0 / 0 | (None) | |
| 4077 | P825D Suitable Replacement | 0 / 0 | (None) | |
| 4072 | P827B High Load | 0 / 0 | (None) | |
| 4067 | P828A Restaurant Tables | 0 / 0 | (None) | |
| 4066 | P828B Black Square | 0 / 0 | (None) | |
| 4064 | P830B Cards Sorting | 0 / 0 | (None) | |
| 4063 | P830C Bamboo Partition | 0 / 0 | (None) | |
| 4061 | P830E Perpetual Motion Machine | 0 / 0 | (None) | |
| 4060 | P831A Unimodal Array | 0 / 0 | (None) | |
| 4059 | P831B Keyboard Layouts | 0 / 0 | (None) | |
| 4056 | P832B Petya and Exam | 0 / 0 | (None) | |
| 4055 | P832C Strange Radiation | 0 / 0 | (None) | |
| 4049 | P833D Red-Black Cobweb | 0 / 0 | (None) | |
| 4047 | P834A The Useless Toy | 0 / 0 | (None) | |
| 4046 | P834B The Festive Evening | 0 / 0 | (None) |
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