Language Details: JavaScript

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JavaScript is a prototype-based scripting language that is dynamic, weakly typed, and has first-class functions.

JavaScript article on Wikipedia

Problems solved

Qualification Round (367 solutions by 149 contestants):
Round 1A (42 solutions by 19 contestants):
Round 1B (7 solutions by 5 contestants):
Round 1C (31 solutions by 13 contestants):
Round 2 (10 solutions by 4 contestants):
Round 3 (6 solutions by 1 contestant):

Submission Origin

United States (33 contestants)
Canada (12 contestants)
France (8 contestants)
India (8 contestants)
China (7 contestants)
Germany (7 contestants)
United Kingdom (6 contestants)
Australia (5 contestants)
Hong Kong (4 contestants)
New Zealand (4 contestants)
Romania (4 contestants)
Ukraine (4 contestants)
Slovakia (3 contestants)
Switzerland (3 contestants)
Taiwan (3 contestants)
Thailand (3 contestants)
Argentina (2 contestants)
Belgium (2 contestants)
Czech Republic (2 contestants)
Israel (2 contestants)
Italy (2 contestants)
Morocco (2 contestants)
Pakistan (2 contestants)
Portugal (2 contestants)
South Korea (2 contestants)
Spain (2 contestants)
Sri Lanka (2 contestants)
Antarctica (1 contestant)
Armenia (1 contestant)
Bangladesh (1 contestant)
Brazil (1 contestant)
Hungary (1 contestant)
Indonesia (1 contestant)
Iran (1 contestant)
Latvia (1 contestant)
Lebanon (1 contestant)
Lithuania (1 contestant)
Malaysia (1 contestant)
Netherlands (1 contestant)
Norway (1 contestant)
Peru (1 contestant)
Poland (1 contestant)
Russia (1 contestant)
Singapore (1 contestant)
South Africa (1 contestant)
Tunisia (1 contestant)
Venezuela (1 contestant)