Language Details: Ruby

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Problems solved

Qualification Round (601 solutions by 197 contestants):
Round 1A (44 solutions by 42 contestants):
Round 1B (104 solutions by 45 contestants):
Round 1C (117 solutions by 46 contestants):
Round 2 (37 solutions by 18 contestants):

Submission Origin

United States (46 contestants)
Japan (28 contestants)
Brazil (20 contestants)
Russia (7 contestants)
United Kingdom (7 contestants)
Canada (6 contestants)
China (6 contestants)
South Korea (6 contestants)
India (5 contestants)
Taiwan (5 contestants)
Argentina (4 contestants)
Australia (4 contestants)
Belgium (4 contestants)
New Zealand (4 contestants)
Poland (4 contestants)
Austria (3 contestants)
Egypt (3 contestants)
Germany (3 contestants)
Jordan (3 contestants)
Spain (3 contestants)
Sweden (3 contestants)
Belarus (2 contestants)
Chile (2 contestants)
Colombia (2 contestants)
Portugal (2 contestants)
Romania (2 contestants)
Switzerland (2 contestants)
Venezuela (2 contestants)
Algeria (1 contestant)
Croatia (1 contestant)
Czech Republic (1 contestant)
Denmark (1 contestant)
Dominican Republic (1 contestant)
Estonia (1 contestant)
France (1 contestant)
Hungary (1 contestant)
Indonesia (1 contestant)
Kenya (1 contestant)
Netherlands (1 contestant)
Philippines (1 contestant)
Singapore (1 contestant)
Thailand (1 contestant)
Turkey (1 contestant)
Ukraine (1 contestant)