Language Details: D
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D is a general purpose systems and applications programming language with C-like syntax and static typing.
— Official website (see also: Wikipedia article)
Problems solved
- Qualification Round (74 solutions by 20 contestants):
 - Oversized Pancake Flipper: 12 small solutions, 13 large solutions.
 - Tidy Numbers: 12 small solutions, 12 large solutions.
 - Bathroom Stalls: 11 small solutions, 8 large-1 solutions, 5 large-2 solutions.
 - Fashion Show: 1 small solution.
 
- Round 1A (19 solutions by 7 contestants):
 - Alphabet Cake: 6 small solutions, 5 large solutions.
 - Ratatouille: 4 small solutions, 3 large solutions.
 - Play the Dragon: 1 small solution.
 
- Round 1B (38 solutions by 10 contestants):
 - Steed 2: Cruise Control: 9 small solutions, 9 large solutions.
 - Stable Neigh-bors: 7 small solutions, 3 large solutions.
 - Pony Express: 6 small solutions, 4 large solutions.
 
- Round 1C (15 solutions by 4 contestants):
 - Ample Syrup: 4 small solutions, 3 large solutions.
 - Parenting Partnering: 3 small solutions, 2 large solutions.
 - Core Training: 3 small solutions.
 
- Round 2 (13 solutions by 4 contestants):
 - Fresh Chocolate: 4 small solutions, 3 large solutions.
 - Roller Coaster Scheduling: 2 small solutions, 1 large solution.
 - Beaming With Joy: 1 small solution, 1 large solution.
 - Shoot the Turrets: 1 small solution.
 
- Round 3 (6 solutions by 1 contestant):
 - Googlements: 1 small solution.
 - Good News and Bad News: 1 small solution, 1 large solution.
 - Mountain Tour: 1 small solution, 1 large solution.
 - Slate Modern: 1 small solution.
 
Submission Origin
| Japan (7 contestants) Russia (4 contestants) China (3 contestants) United States (2 contestants)  | India (2 contestants) United Kingdom (1 contestant) South Korea (1 contestant) Singapore (1 contestant)  | New Zealand (1 contestant) Morocco (1 contestant) Austria (1 contestant)  |