Language Details: Ruby

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Problems solved

Qualification Round (1632 solutions by 475 contestants):
Round 1A (219 solutions by 125 contestants):
Round 1B (125 solutions by 70 contestants):
Round 1C (127 solutions by 71 contestants):
Round 2 (23 solutions by 15 contestants):

Submission Origin

United States (101 contestants)
Japan (88 contestants)
India (33 contestants)
China (29 contestants)
Brazil (17 contestants)
France (15 contestants)
United Kingdom (14 contestants)
Canada (13 contestants)
Russia (12 contestants)
Spain (11 contestants)
Thailand (10 contestants)
Germany (9 contestants)
Argentina (8 contestants)
Australia (7 contestants)
Chile (7 contestants)
Mexico (7 contestants)
Egypt (6 contestants)
Netherlands (6 contestants)
South Korea (6 contestants)
Colombia (5 contestants)
Czech Republic (5 contestants)
Poland (5 contestants)
Portugal (5 contestants)
Greece (4 contestants)
Philippines (4 contestants)
Taiwan (4 contestants)
Turkey (4 contestants)
Bulgaria (3 contestants)
Croatia (3 contestants)
Denmark (3 contestants)
Indonesia (3 contestants)
Italy (3 contestants)
New Zealand (3 contestants)
Sweden (3 contestants)
Switzerland (3 contestants)
Ukraine (3 contestants)
Vietnam (3 contestants)
Belarus (2 contestants)
Belgium (2 contestants)
Bolivia (2 contestants)
Ecuador (2 contestants)
Hong Kong (2 contestants)
Hungary (2 contestants)
Israel (2 contestants)
Norway (2 contestants)
Romania (2 contestants)
Singapore (2 contestants)
Venezuela (2 contestants)
Albania (1 contestant)
Austria (1 contestant)
Bhutan (1 contestant)
Cuba (1 contestant)
Cyprus (1 contestant)
Estonia (1 contestant)
Iran (1 contestant)
Ireland (1 contestant)
Jordan (1 contestant)
Kazakhstan (1 contestant)
Latvia (1 contestant)
Lithuania (1 contestant)
Malaysia (1 contestant)
Pakistan (1 contestant)
Palestinian Territory (1 contestant)
Slovakia (1 contestant)
South Africa (1 contestant)
Sri Lanka (1 contestant)
Tunisia (1 contestant)
Uruguay (1 contestant)