| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 4001 | P852A Digits | 0 / 0 | (None) | |
| 4004 | P858B Which floor? | 0 / 0 | (None) | |
| 4008 | P859B Lazy Security Guard | 0 / 0 | (None) | |
| 4015 | P863B Kayaking | 0 / 0 | (None) | |
| 4019 | P864B Polycarp and Letters | 0 / 0 | (None) | |
| 4025 | P865E Hex Dyslexia | 0 / 0 | (None) | |
| 4029 | P868D Huge Strings | 0 / 0 | (None) | |
| 4034 | P869D The Overdosing Ubiquity | 0 / 0 | (None) | |
| 4035 | P870A Search for Pretty Integers | 4 / 10 | 9 | |
| 4037 | P870D Something with XOR Queries | 0 / 0 | (None) | |
| 4043 | P875A Classroom Watch | 0 / 0 | (None) | |
| 4059 | P883H Palindromic Cut | 0 / 0 | (None) | |
| 4070 | P887B Cubes for Masha | 0 / 0 | (None) | |
| 4071 | P887C Solution for Cube | 0 / 0 | (None) | |
| 4073 | P888A Local Extrema | 0 / 0 | (None) | |
| 4078 | P891A Pride | 0 / 0 | (None) | |
| 4086 | P894A QAQ | 0 / 0 | (None) | |
| 4089 | P895A Pizza Separation | 0 / 0 | (None) | |
| 4100 | P898F Restoring the Expression | 0 / 0 | (None) | |
| 4105 | P900C Remove Extra One | 0 / 0 | (None) |
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