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Hot problems
| Problem | Category | Points | AC % | Users |
|---|---|---|---|---|
| Duty Of Call | Contest Problems | 10p | 24.0% | 8 |
| Almost Sorted | Uncategorized | 10p | 17.6% | 6 |
| ECOO '19 R1 P3 - Side Scrolling Simulator | Contest Problems | 10p | 17.1% | 5 |
| Mars Elections | ICS3 & ICS4 | 5 | 20.2% | 43 |
| Elevator Doors | ICS3 & ICS4 | 3 | 66.7% | 5 |
| Encryption by Reversal | Contest Problems | 7 | 24.6% | 10 |
| English | Uncategorized | 5 | 16.9% | 21 |
| CCC '22 J2 - Fergusonball Ratings | Contest Problems | 5 | 58.9% | 41 |
| Fruit Boats | Uncategorized | 7p | 20.5% | 30 |
| Greatest Common Divisor | ICS3 & ICS4 | 3 | 63.7% | 234 |
| CCC '22 S2 - Good Groups | Contest Problems | 5 | 38.5% | 6 |
| Group Assignment | ICS3 & ICS4 | 3 | 56.4% | 218 |
| Guessing Game | ICS3 & ICS4 | 3 | 26.2% | 215 |
| Hackathon Present 0 | Uncategorized | 1 | 9.8% | 4 |
| Hackathon Present 5 | Contest Problems | 1 | 55.8% | 25 |
| Hackathon 7 - Type Racer Battle (with Naccarato) | Seasonal | 7 | 25.8% | 16 |
| Hackathon Present 8 | Seasonal | 8 | 81.8% | 18 |
| CCC '22 J3 - Harp Tuning | Contest Problems | 5 | 48.5% | 26 |
| Hashbrown | Classics | 10 | 37.5% | 9 |
| Heart Rate | Uncategorized | 1 | 60.0% | 44 |
| Hello, World! | Uncategorized | 1 | 61.5% | 171 |
| Hi Lo | ICS3 & ICS4 | 3 | 24.2% | 158 |
| Hockey Scores | Contest Problems | 12 | 22.2% | 1 |
| How's the Weather | ICS3 & ICS4 | 3 | 80.0% | 7 |
| Huffman Decoding | Uncategorized | 5 | 28.9% | 30 |
| Huffman Encoding | Uncategorized | 5 | 47.5% | 43 |
| Integer Type | ICS3 & ICS4 | 3 | 29.6% | 29 |
| Investment Calculator | ICS3 & ICS4 | 3 | 30.2% | 207 |
| IOI '01 P1 - Mobile Phones | Classics | 15 | 32.9% | 18 |
| Is Prime | ICS3 & ICS4 | 3 | 37.0% | 249 |
| k-Intersecting pair | Uncategorized | 12 | 13.3% | 11 |
| Lady of the Lake | Contest Problems | 3 | 14.1% | 18 |
| High Octane League of Legends Gameplay | Uncategorized | 3 | 44.4% | 25 |
| Leap Year | ICS3 & ICS4 | 3 | 47.5% | 31 |
| Lexicographically Sorted Words | Uncategorized | 5p | 60.9% | 36 |
| Loneliness | Uncategorized | 5 | 40.4% | 16 |
| Lowest Factor | ICS3 & ICS4 | 3 | 40.9% | 18 |
| Math Class Purge | Uncategorized | 3 | 39.3% | 44 |
| Math Tutor | ICS3 & ICS4 | 3 | 33.0% | 219 |
| Matrix Test | Contest Problems | 5 | 33.3% | 8 |
| Maximum-Minimum Difference | Uncategorized | 10 | 17.8% | 17 |
| Max of Three | ICS3 & ICS4 | 3 | 51.0% | 38 |
| Multiple Integer Addition | Uncategorized | 4 | 72.8% | 62 |
| Minecraft Redstone | Uncategorized | 5 | 43.5% | 15 |
| Monogram | ICS3 & ICS4 | 4p | 32.8% | 174 |
| Making an Easy Problem | Contest Problems | 3 | 67.9% | 45 |
| Were You Paying Attention? | Contest Problems | 3 | 40.3% | 25 |
| osu! klikin sircles | Contest Problems | 3 | 52.2% | 19 |
| Awkward Number | Contest Problems | 7 | 24.1% | 12 |
| Buttons | Contest Problems | 7 | 22.8% | 19 |