Language Details: Lisp

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Lisp is a family of computer programming languages with a long history and a distinctive, fully parenthesized Polish prefix notation.
— Lisp article on Wikipedia


~~abeaumont~~ (8 sets) ~~Carlitos~~ (8 sets) ~~lpetru~~ (9 sets) ~~hyPiRion~~ (1 set) ~~fcollot~~ (11 sets) ~~Z.Shang~~ (6 sets)	~~orivej~~ (9 sets) ~~tevtinacni~~ (1 set) ~~bertschi~~ (5 sets) ~~Jabberwockey~~ (1 set) ~~DrakeAnderson~~ (1 set) ~~tekess~~ (5 sets)	~~crazydonkey200~~ (4 sets) ~~Torrido~~ (3 sets) ~~C4b3z0n~~ (1 set) ~~2old2randr~~ (3 sets) ~~YuriAlbuquerque~~ (3 sets) ~~parapoppo~~ (1 set)	~~jepugs~~ (2 sets) ~~Strigoides~~ (2 sets) ~~tarakotarao~~ (2 sets) ~~jakzale~~ (2 sets) ~~Nyt~~ (1 set)

Problems solved

Qualification Round (67 solutions by 22 contestants):

Magic Trick: 20 small solutions.
Cookie Clicker Alpha: 16 small solutions, 9 large solutions.
Minesweeper Master: 3 small solutions, 3 large solutions.
Deceitful War: 9 small solutions, 7 large solutions.

Round 1B (10 solutions by 5 contestants):

The Repeater: 5 small solutions, 2 large solutions.
New Lottery Game: 3 small solutions.

Round 1C (12 solutions by 6 contestants):

Part Elf: 5 small solutions, 6 large solutions.
Reordering Train Cars: 1 small solution.

Submission Origin

United States (4 contestants)
Japan (3 contestants)
Switzerland (2 contestants)
Spain (2 contestants)
Germany (2 contestants)

Western Sahara (1 contestant)
Poland (1 contestant)
Philippines (1 contestant)
Norway (1 contestant)
New Zealand (1 contestant)

France (1 contestant)
Czech Republic (1 contestant)
China (1 contestant)
Brazil (1 contestant)
Argentina (1 contestant)