Language Details: Ruby

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Problems solved

Qualification Round (1212 solutions by 438 contestants):
Round 1A (109 solutions by 56 contestants):
Round 1B (93 solutions by 55 contestants):
Round 1C (88 solutions by 52 contestants):
Round 2 (14 solutions by 9 contestants):
Round 3 (3 solutions by 2 contestants):

Submission Origin

United States (92 contestants)
Japan (67 contestants)
Brazil (25 contestants)
India (24 contestants)
China (16 contestants)
Canada (15 contestants)
Russia (13 contestants)
Germany (12 contestants)
France (10 contestants)
Sweden (10 contestants)
Thailand (10 contestants)
Poland (9 contestants)
United Kingdom (9 contestants)
Australia (7 contestants)
Chile (7 contestants)
Egypt (7 contestants)
... (6 contestants)
Spain (6 contestants)
Hungary (5 contestants)
South Korea (5 contestants)
Argentina (4 contestants)
Belgium (4 contestants)
Indonesia (4 contestants)
Mexico (4 contestants)
New Zealand (4 contestants)
Singapore (4 contestants)
Colombia (3 contestants)
Finland (3 contestants)
Italy (3 contestants)
Jordan (3 contestants)
Philippines (3 contestants)
Portugal (3 contestants)
Romania (3 contestants)
South Africa (3 contestants)
Turkey (3 contestants)
Ukraine (3 contestants)
Austria (2 contestants)
Belarus (2 contestants)
Czech Republic (2 contestants)
Ecuador (2 contestants)
Hong Kong (2 contestants)
Iran (2 contestants)
Malaysia (2 contestants)
Netherlands (2 contestants)
Norway (2 contestants)
Senegal (2 contestants)
Taiwan (2 contestants)
Venezuela (2 contestants)
Vietnam (2 contestants)
Azerbaijan (1 contestant)
Dominican Republic (1 contestant)
Ghana (1 contestant)
Greece (1 contestant)
Ireland (1 contestant)
Kazakhstan (1 contestant)
Latvia (1 contestant)
Lithuania (1 contestant)
Moldova (1 contestant)
Paraguay (1 contestant)
Sri Lanka (1 contestant)
Syria (1 contestant)