Problems
| Problem | Category | Types | Points | AC % | Users | |
|---|---|---|---|---|---|---|
| Bubble Cup V9 B Underfail | Bubble Cup | Graph Theory | 20 | 7.3% | 3 | |
| Bubble Cup V9 C Paint it really, really black | Bubble Cup | Graph Theory | 10 | 15.4% | 21 | |
| Bubble Cup V9 D Potions homework | Bubble Cup | Greedy Algorithms | 5 | 18.3% | 258 | |
| Bubble Cup V9 E Festival organization | Bubble Cup | Advanced Math | 25 | 0.0% | 0 | |
| Bubble Cup V9 F Pokermon League challenge | Bubble Cup | Graph Theory | 20 | 25.0% | 4 | |
| Bubble Cup V9 I R3D3's summer adventure | Bubble Cup | Greedy Algorithms, Intermediate Math | 25 | 15.1% | 4 | |
| Bubble Cup V11 A Splitting Money | Bubble Cup | Implementation | 7 | 24.8% | 31 | |
| Big Deposits | Uncategorized | Implementation | 7p | 16.9% | 305 | |
| List Minimum | Uncategorized | Brute Force, Implementation | 3 | 50.1% | 3349 | |
| List Minimum (Easy) | Uncategorized | Implementation | 3p | 11.8% | 869 | |
| List Minimum (Hard) | Uncategorized | Implementation | 5 | 36.3% | 1695 | |
| List Minimum (Harder) | Uncategorized | Implementation | 7 | 0.2% | 5 | |
| Lexicographically Least Substring | Uncategorized | Brute Force, String Algorithms | 5 | 46.0% | 637 | |
| Lexicographically Least Substring (Hard) | Uncategorized | String Algorithms | 15 | 11.1% | 193 | |
| Next Prime | Classics | Simple Math | 5 | 20.2% | 2272 | |
| Next Prime (Hard) | Classics | Advanced Math | 15 | 8.1% | 178 | |
| String Finding | Uncategorized | String Algorithms | 5 | 16.3% | 496 | |
| String Finding - Hacking | Uncategorized | String Algorithms | 10 | 6.0% | 18 | |
| Back From Summer '17 P1: Pithy Pastimes | Seasonal | Implementation | 3 | 39.5% | 794 | |
| Back From Summer '17 P2: Crayola Lightsaber | Seasonal | Greedy Algorithms, Simple Math | 7 | 25.3% | 613 | |
| Back From Summer '17 P3: Basketball Dodgeball | Seasonal | Data Structures | 7 | 19.6% | 82 | |
| Back From Summer '17 P4: Pair Programming | Seasonal | Graph Theory | 12p | 27.4% | 50 | |
| Back From Summer '17 P5: Confusing Codeforces Contest | Seasonal | Ad Hoc, Data Structures | 25p | 13.7% | 32 | |
| Back From Summer '17 P6: Crowded Cities | Seasonal | Ad Hoc | 20p | 12.1% | 129 | |
| Back From Summer '19 P1: Winnie's Orphans | Seasonal | Implementation | 3 | 43.5% | 344 | |
| Back From Summer '19 P2: Straying From God's Light | Seasonal | Graph Theory | 7p | 17.7% | 175 | |
| Back From Summer '19 P3: ASDFGHJKL | Seasonal | Greedy Algorithms | 10p | 8.7% | 62 | |
| Back From Summer '19 P4: Wesley And Cake | Seasonal | Geometry | 25p | 23.1% | 8 | |
| Back From Summer '19 P5: ABC123E | Seasonal | Dynamic Programming, Graph Theory | 17p | 31.7% | 35 | |
| Back From Summer '19 P6: Composite Zeyu | Seasonal | Data Structures, Dynamic Programming, Intermediate Math | 15p | 37.9% | 44 | |
| Bulgarian OI '09 P1 - Minesweeper | Bulgarian OI | Geometry, Implementation | 10 | 42.1% | 65 | |
| Bulgarian OI '09 P2 - Boxen | Bulgarian OI | Graph Theory | 12 | 41.5% | 189 | |
| Bulgarian OI '09 P4 - Frogs | Bulgarian OI | Data Structures, Implementation | 12p | 23.4% | 130 | |
| Bulgarian OI '09 P5 - Special Sequence | Bulgarian OI | Uncategorized | 30p | 15.3% | 34 | |
| Bulgarian OI '09 P6 - Diamonds | Bulgarian OI | Data Structures | 12 | 22.6% | 55 | |
| Binary | Uncategorized | Simple Math, String Algorithms | 5 | 24.0% | 909 | |
| Bill's Binoculars | Uncategorized | Implementation | 5 | 40.3% | 55 | |
| Bit Combinations | Uncategorized | Ad Hoc | 7 | 32.9% | 19 | |
| Fast Bit Duplication | Uncategorized | Implementation | 10 | 32.3% | 48 | |
| Bitmask Magic | Uncategorized | Dynamic Programming, Graph Theory | 15p | 29.4% | 24 | |
| Balkan OI '11 P1 - Two Circles | Balkan OI | Geometry | 30p | 11.5% | 11 | |
| Balkan OI '11 P2 - Decrypt | Balkan OI | Advanced Math | 15p | 52.6% | 8 | |
| Balkan OI '11 P3 - Medians | Balkan OI | Greedy Algorithms | 12p | 28.5% | 41 | |
| Balkan OI '11 P4 - Compare | Balkan OI | Ad Hoc | 25p | 28.8% | 17 | |
| Balkan OI '11 P5 - Time Is Money | Balkan OI | Divide and Conquer, Geometry, Graph Theory | 30p | 16.7% | 48 | |
| Balkan OI '11 P6 - Trapezoids | Balkan OI | Data Structures | 20p | 29.1% | 28 | |
| A Block Game | Uncategorized | Simple Math | 3 | 38.3% | 106 | |
| Bob Hates Triangles | Uncategorized | Graph Theory, Implementation | 7 | 47.2% | 90 | |
| Bob's Rocks | Uncategorized | Implementation | 5 | 47.4% | 164 | |
| Bob's Temple | Uncategorized | Implementation | 5 | 55.6% | 71 |