Language Details: Ruby
- Qualification Round
- Used in 396 solutions by 122 contestants:
- Saving the Universe: 117 small solutions, 107 large solutions.
- Train Timetable: 88 small solutions, 74 large solutions.
- Fly Swatter: 8 small solutions, 2 large solutions.
- Round 1A
- Used in 100 solutions by 44 contestants:
- Minimum Scalar Product: 43 small solutions, 43 large solutions.
- Milkshakes: 3 small solutions, 3 large solutions.
- Numbers: 7 small solutions, 1 large solution.
- Round 1B
- Used in 53 solutions by 39 contestants:
- Crop Triangles: 38 small solutions, 7 large solutions.
- Number Sets: 4 small solutions.
- Mousetrap: 4 small solutions.
- Round 1C
- Used in 95 solutions by 44 contestants:
- Text Messaging Outrage: 43 small solutions, 43 large solutions.
- Ugly Numbers: 3 small solutions.
- Increasing Speed Limits: 6 small solutions.
- Round 2
- Used in 55 solutions by 25 contestants:
- Cheating a Boolean Tree: 15 small solutions, 13 large solutions.
- Triangle Areas: 6 small solutions.
- Star Wars: 2 small solutions, 2 large solutions.
- PermRLE: 17 small solutions.
- Round 3
- Used in 10 solutions by 5 contestants:
- How Big Are the Pockets?: 3 small solutions, 3 large solutions.
- Endless Knight: 4 small solutions.
- APAC Semifinal
- Used in 3 solutions by 1 contestants:
- Apocalypse Soon: 1 small solution, 1 large solution.
- Modern Art Plagiarism: 1 small solution.
Submission Origin
| United States (34 contestants) Japan (16 contestants) Brazil (9 contestants) Poland (6 contestants) South Korea (6 contestants) India (5 contestants) Russia (5 contestants) United Kingdom (5 contestants) Belarus (3 contestants) Belgium (3 contestants) | Canada (3 contestants) Colombia (3 contestants) Germany (3 contestants) Philippines (3 contestants) Spain (3 contestants) Taiwan (3 contestants) Austria (2 contestants) France (2 contestants) Italy (2 contestants) Sweden (2 contestants) | Thailand (2 contestants) Argentina (1 contestant) Australia (1 contestant) China (1 contestant) Peru (1 contestant) Singapore (1 contestant) South Africa (1 contestant) Switzerland (1 contestant) Ukraine (1 contestant) Venezuela (1 contestant) |