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


~~jmazon~~ (2 sets) ~~vii~~ (12 sets) ~~jrwats~~ (6 sets) ~~vukung~~ (11 sets) ~~k.kojima~~ (11 sets)	~~s10wh34d~~ (12 sets) ~~insertsomethingwitty~~ (11 sets) ~~djb~~ (6 sets) ~~rata~~ (7 sets) ~~Ronin.Gabriel~~ (3 sets)	~~xisco~~ (5 sets) ~~ruio~~ (4 sets) ~~aleksandr.vin~~ (3 sets) ~~Snackbar~~ (3 sets) ~~dscaife~~ (2 sets)	~~wgl~~ (2 sets) ~~alhazred~~ (2 sets) ~~Metaripple~~ (1 set) ~~sebajara~~ (1 set)

Problems solved

Qualification Round (66 solutions by 19 contestants):

Snapper Chain: 17 small solutions, 13 large solutions.
Fair Warning: 11 small solutions, 11 large solutions.
Theme Park: 10 small solutions, 4 large solutions.

Round 1A (5 solutions by 2 contestants):

Rotate: 2 small solutions, 2 large solutions.
Number Game: 1 small solution.

Round 1B (21 solutions by 7 contestants):

File Fix-it: 6 small solutions, 6 large solutions.
Picking Up Chicks: 2 small solutions, 1 large solution.
Your Rank is Pure: 4 small solutions, 2 large solutions.

Round 1C (7 solutions by 3 contestants):

Rope Intranet: 3 small solutions, 3 large solutions.
Load Testing: 1 small solution.

Round 2 (5 solutions by 4 contestants):

World Cup 2010: 2 small solutions.
Bacteria: 2 small solutions.
Grazing Google Goats: 1 small solution.

Submission Origin

United States (5 contestants)
Russia (3 contestants)
Spain (2 contestants)
Chile (2 contestants)

United Kingdom (1 contestant)
Japan (1 contestant)
Hungary (1 contestant)
Germany (1 contestant)

France (1 contestant)
Canada (1 contestant)
Australia (1 contestant)