Language Details: Ruby

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Problems solved

Qualification Round (1467 solutions by 449 contestants):
Round 1A (80 solutions by 46 contestants):
Round 1B (207 solutions by 109 contestants):
Round 1C (145 solutions by 68 contestants):
Round 2 (58 solutions by 17 contestants):
Round 3 (2 solutions by 1 contestant):

Submission Origin

United States (83 contestants)
Japan (56 contestants)
India (32 contestants)
Brazil (20 contestants)
China (20 contestants)
United Kingdom (19 contestants)
Canada (17 contestants)
France (16 contestants)
Thailand (13 contestants)
Germany (11 contestants)
South Korea (10 contestants)
Poland (8 contestants)
Taiwan (8 contestants)
Australia (7 contestants)
Mexico (7 contestants)
Russia (7 contestants)
Spain (7 contestants)
Chile (6 contestants)
Romania (6 contestants)
Belarus (5 contestants)
Slovakia (5 contestants)
Switzerland (5 contestants)
Austria (4 contestants)
Czech Republic (4 contestants)
Finland (4 contestants)
Hungary (4 contestants)
Italy (4 contestants)
Ukraine (4 contestants)
Argentina (3 contestants)
Belgium (3 contestants)
Bolivia (3 contestants)
Egypt (3 contestants)
Indonesia (3 contestants)
Israel (3 contestants)
Jordan (3 contestants)
Portugal (3 contestants)
South Africa (3 contestants)
Vietnam (3 contestants)
Croatia (2 contestants)
Greece (2 contestants)
Iran (2 contestants)
Iraq (2 contestants)
Moldova (2 contestants)
Netherlands (2 contestants)
New Zealand (2 contestants)
Norway (2 contestants)
Philippines (2 contestants)
Albania (1 contestant)
Aruba (1 contestant)
Bhutan (1 contestant)
Colombia (1 contestant)
Cyprus (1 contestant)
Denmark (1 contestant)
Ecuador (1 contestant)
Estonia (1 contestant)
Georgia (1 contestant)
Hong Kong (1 contestant)
Ireland (1 contestant)
Kazakhstan (1 contestant)
Latvia (1 contestant)
Lithuania (1 contestant)
Malaysia (1 contestant)
Nepal (1 contestant)
Nicaragua (1 contestant)
Singapore (1 contestant)
Slovenia (1 contestant)
Sweden (1 contestant)
Syria (1 contestant)
Tunisia (1 contestant)
Turkey (1 contestant)
Uruguay (1 contestant)
Venezuela (1 contestant)