Problems
| Problem Name | Code | Points | Users | AC Rate | Date Added |
|---|---|---|---|---|---|
| Woburn Idol | q2 | 3 | 322 | 33.92% | 2011-03-08 |
| Grid Sums | q3 | 3 | 219 | 46.17% | 2011-03-08 |
| Connect 4 | q4 | 3 | 184 | 21.29% | 2011-03-08 |
| Encryption Grid | q5 | 7 | 90 | 49.07% | 2011-03-08 |
| Betty's Candy Cane | q6 | 10p | 87 | 48.40% | 2011-03-10 |
| A Romantic Dinner Outing | rdinner | 20 | 11 | 19.77% | 2014-07-08 |
| Root Solver | rootsolve | 30p | 1 | 2.20% | 2012-07-28 |
| Rubik's Cube Solver | rubik | 50p | 1 | 0.40% | 2008-12-25 |
| Super Boggle | sboggle | 15p | 4 | 17.02% | 2012-04-15 |
| Skyscrapers | skyscrapers | 15p | 27 | 12.28% | 2009-02-13 |
| Do You Want to Build a Snowman? | snowman | 7 | 12 | 41.30% | 2014-06-29 |
| Subway Routes | subway | 17p | 44 | 45.11% | 2012-08-10 |
| System Solver | syssolve | 20p | 8 | 12.30% | 2013-07-12 |
| Alpha Nerd (Hard) | wc174s4h | 25p | 0 | 100.00% | 2018-04-23 |
| WC18 Finals - Conditional Contracts | wc18fj1 | 5p | 20 | 35.94% | 2019-05-18 |
| WC18 Finals - Script Doctor | wc18fj2 | 5p | 18 | 33.33% | 2019-05-18 |
| WC18 Finals - Behind the Scenes | wc18fs1 | 8p | 23 | 25.53% | 2019-05-18 |
| WC18 Finals - Top Billing | wc18fs2 | 12p | 21 | 30.26% | 2019-05-18 |
| WC18 Finals - Screen Time | wc18fs3 | 14p | 16 | 20.25% | 2019-05-18 |
| WC18 Finals - Posters | wc18fs4 | 20p | 3 | 17.39% | 2019-05-18 |
| WC18 Finals - Opening Weekend | wc18fs5 | 25p | 3 | 9.09% | 2019-05-18 |
| Word Wrap Cypher | wordwrap | 7 | 24 | 31.40% | 2014-06-29 |
| Crosswords | xword | 15p | 4 | 20.00% | 2011-12-24 |
| Non-space-separated | nospaces | 10 | 34 | 28.74% | 2011-02-22 |
| Busy Schedule | sched | 10 | 28 | 44.87% | 2011-02-22 |
| Virtuoso | virtuoso | 15 | 27 | 18.54% | 2011-02-22 |
| The Cake is a Dessert | cake | 12 | 85 | 25.11% | 2011-02-22 |
| Water | avatarwater | 3 | 317 | 54.52% | 2014-10-06 |
| Earth | avatarearth | 3 | 136 | 30.19% | 2014-10-06 |
| Fire | avatarfire | 5 | 94 | 27.79% | 2014-10-06 |
| Air | avatarair | 7 | 34 | 15.13% | 2014-10-06 |
| Spirits | avatarspirits | 10 | 9 | 8.33% | 2014-10-06 |
| Change | avatarchange | 7 | 14 | 39.53% | 2014-10-06 |
| Balance | avatarbalance | 10 | 68 | 33.45% | 2014-10-06 |
| Bincent's Billows | ecooqual2018p1 | 3 | 72 | 46.30% | 2018-01-28 |
| Educational Educational Computing Organization of Ontario Organization of Ontario | ecooqual2018p2 | 5 | 31 | 19.32% | 2018-01-28 |
| Shattering Shadows 2 | ecooqual2018p3 | 7p | 4 | 12.12% | 2018-01-28 |
| IOI tour | ecooqual2018p4 | 10p | 5 | 12.50% | 2018-01-28 |
| Trick-or-Treat | trickortreat | 5 | 78 | 19.39% | 2014-11-07 |
| Brap Lesh Mafia | brapleshmafia | 5 | 97 | 21.89% | 2014-11-07 |
| 2spooky4me | 2spooky4me | 7 | 38 | 9.85% | 2014-11-07 |
| Prime Street | primestreet | 10 | 22 | 11.81% | 2014-11-07 |
| Stingy Candyman | candyman | 10 | 19 | 22.52% | 2014-11-07 |
| Rabbit Girls | rabbitgirls | 5 | 88 | 20.88% | 2014-11-04 |
| Cat Girls | catgirls | 15p | 25 | 24.16% | 2014-11-04 |
| Dog Girls | doggirls | 15p | 11 | 15.66% | 2014-11-04 |
| Fox Girls | foxgirls | 25p | 5 | 16.33% | 2014-11-04 |
| Tenri | tenri | 20p | 27 | 25.50% | 2014-03-19 |
| Kirito | kirito | 25p | 26 | 20.78% | 2014-03-19 |
| Esdeath | esdeath | 20p | 28 | 9.03% | 2014-03-19 |
