Problems
| Problem Name | Code | Points | Users | AC Rate | Date Added |
|---|---|---|---|---|---|
| Intervals | intrvl | 10p | 87 | 20.45% | 2008-12-05 |
| Presents | presents | 10 | 36 | 14.61% | 2008-12-20 |
| Sleigh Ride | sleigh | 10 | 102 | 25.70% | 2008-12-20 |
| Lego | lego | 20p | 11 | 18.59% | 2008-12-20 |
| Battleships | bship | 10p | 48 | 10.44% | 2009-01-05 |
| Coding Spree | spree | 10p | 199 | 29.71% | 2009-01-05 |
| The Codefather | father | 30p | 14 | 4.74% | 2009-01-05 |
| Advanced Battleships | abship | 15p | 7 | 10.09% | 2009-01-18 |
| Detectors | detectors | 15p | 2 | 2.03% | 2009-01-21 |
| Scansion | scansion | 10 | 62 | 23.19% | 2009-01-24 |
| TC | tc | 15p | 29 | 10.02% | 2009-01-27 |
| Hashing | hash | 10 | 12 | 21.17% | 2009-02-15 |
| Security Cameras | camera | 20 | 29 | 30.20% | 2009-02-15 |
| Secret Room | secret | 25p | 1 | 2.50% | 2009-02-15 |
| The Fox and the Wolf | foxw | 30p | 6 | 6.73% | 2009-03-11 |
| Anti-Fire Fox | foxf | 25p | 1 | 6.67% | 2009-03-20 |
| Foxlings | foxl | 10p | 49 | 13.37% | 2009-03-11 |
| Union Laser | boxu | 25p | 1 | 2.67% | 2009-05-17 |
| Boxdropper | boxd | 20p | 13 | 18.00% | 2009-05-15 |
| Boxlings | boxl | 20p | 12 | 9.62% | 2009-05-30 |
| CCC96S1 - DPA | ccc96s1 | 5 | 572 | 28.90% | 2008-09-28 |
| CCC96S2 - Divisibility by 11 | ccc96s2 | 5 | 105 | 12.32% | 2008-09-28 |
| CCC96S3 - Pattern Generator | ccc96s3 | 10 | 239 | 25.29% | 2008-09-28 |
| CCC96S4 - When in Rome | ccc96s4 | 10 | 179 | 27.02% | 2008-09-28 |
| CCC96S5 - Max Distance | ccc96s5 | 10p | 163 | 18.80% | 2008-09-28 |
| CCC96 Stage 2 - Train Swapping | ccc96s2p1 | 7 | 183 | 34.41% | 2013-06-24 |
| CCC96 Stage 2 - Safebreaker | ccc96s2p2 | 10 | 30 | 33.64% | 2013-06-24 |
| CCC96 Stage 2 - Quadtree | ccc96s2p3 | 15 | 52 | 40.71% | 2013-06-25 |
| CCC96 Stage 2 - Where's Waldorf? | ccc96s2p4 | 10 | 45 | 32.07% | 2013-06-25 |
| CCC96 Stage 2 - All Roads Lead Where? | ccc96s2p5 | 10 | 47 | 56.99% | 2013-06-25 |
| CCC96 Stage 2 - Hoppers | ccc96s2p6 | 15 | 33 | 23.08% | 2013-06-26 |
| CCC97S1 - Sentences | ccc97s1 | 5 | 269 | 30.39% | 2008-09-28 |
| CCC97S2 - Nasty | ccc97s2 | 5 | 220 | 44.61% | 2008-09-28 |
| CCC97S3 - Knockout | ccc97s3 | 10 | 133 | 33.86% | 2008-09-28 |
| CCC97S4 - Dictionary | ccc97s4 | 10 | 123 | 34.96% | 2008-09-28 |
| CCC97S5 - Division | ccc97s5 | 10 | 35 | 15.95% | 2008-09-29 |
| CCC98S1 - Censor | ccc98s1 | 5 | 323 | 30.54% | 2008-10-01 |
| CCC98S3 - Mars Rover | ccc98s3 | 10 | 65 | 28.29% | 2008-09-29 |
| CCC98S4 - Lottery | ccc98s4 | 10 | 65 | 26.39% | 2008-09-27 |
| CCC98S5 - Mountain Passage | ccc98s5 | 10 | 99 | 30.63% | 2008-09-27 |
| CCC99S1 - Card Game | ccc99s1 | 5 | 111 | 34.69% | 2008-10-03 |
| CCC99S2 - Year 2000 | ccc99s2 | 10 | 25 | 11.03% | 2008-09-29 |
| CCC99S3 - Divided Fractals | ccc99s3 | 10 | 40 | 39.10% | 2008-10-01 |
| CCC99S4 - Knightly Pursuit | ccc99s4 | 10 | 64 | 12.78% | 2008-10-01 |
| CCC99S5 - Letter Arithmetic | ccc99s5 | 15 | 25 | 21.56% | 2008-09-29 |
| CCC99 Stage 2 - Can't Get There | ccc99s2p1 | 20 | 18 | 11.79% | 2009-04-19 |
| CCC99 Stage 2 - Common Words | ccc99s2p2 | 10 | 58 | 10.12% | 2009-04-19 |
| CCC99 Stage 2 - Mandelzuma | ccc99s2p3 | 20p | 14 | 23.64% | 2009-04-19 |
| CCC99 Stage 2 - Maple Roundup | ccc99s2p4 | 10 | 64 | 28.30% | 2009-04-19 |
| CCC99 Stage 2 - Sum of Products | ccc99s2p5 | 10 | 20 | 25.88% | 2009-04-19 |
