Language Details: Ruby

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Problems solved

Qualification Round (623 solutions by 221 contestants):
Round 1A (51 solutions by 24 contestants):
Round 1B (157 solutions by 59 contestants):
Round 1C (141 solutions by 53 contestants):
Round 2 (20 solutions by 11 contestants):
Round 3 (1 solution by 1 contestant):

Submission Origin

Japan (54 contestants)
United States (34 contestants)
Brazil (18 contestants)
China (10 contestants)
United Kingdom (10 contestants)
India (7 contestants)
Poland (6 contestants)
Russia (6 contestants)
South Korea (6 contestants)
Colombia (5 contestants)
Jordan (4 contestants)
Philippines (4 contestants)
Spain (4 contestants)
Belarus (3 contestants)
Belgium (3 contestants)
Bulgaria (3 contestants)
Canada (3 contestants)
Estonia (3 contestants)
Germany (3 contestants)
Portugal (3 contestants)
Slovakia (3 contestants)
Switzerland (3 contestants)
Vietnam (3 contestants)
Austria (2 contestants)
Chile (2 contestants)
Egypt (2 contestants)
Hong Kong (2 contestants)
Hungary (2 contestants)
Ireland (2 contestants)
Mexico (2 contestants)
Sweden (2 contestants)
Taiwan (2 contestants)
Thailand (2 contestants)
Argentina (1 contestant)
Costa Rica (1 contestant)
Croatia (1 contestant)
Czech Republic (1 contestant)
Dominican Republic (1 contestant)
Finland (1 contestant)
France (1 contestant)
Israel (1 contestant)
Latvia (1 contestant)
Lithuania (1 contestant)
Madagascar (1 contestant)
Moldova (1 contestant)
Nepal (1 contestant)
Netherlands (1 contestant)
Norway (1 contestant)
Singapore (1 contestant)
Turkey (1 contestant)
Zimbabwe (1 contestant)