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Problems solved

Qualification Round (914 solutions by 302 contestants):
Round 1A (43 solutions by 37 contestants):
Round 1B (54 solutions by 36 contestants):
Round 1C (55 solutions by 38 contestants):
Round 2 (2 solutions by 2 contestants):

Submission Origin

India (38 contestants)
United States (30 contestants)
Germany (18 contestants)
Brazil (13 contestants)
France (13 contestants)
Spain (12 contestants)
United Kingdom (11 contestants)
Thailand (9 contestants)
China (7 contestants)
Egypt (7 contestants)
Japan (7 contestants)
Netherlands (7 contestants)
Russia (7 contestants)
Hong Kong (6 contestants)
Poland (6 contestants)
Ukraine (6 contestants)
Indonesia (5 contestants)
Mexico (5 contestants)
Romania (5 contestants)
South Africa (5 contestants)
Canada (4 contestants)
Czech Republic (4 contestants)
Pakistan (4 contestants)
Slovakia (4 contestants)
Sri Lanka (4 contestants)
Australia (3 contestants)
Bangladesh (3 contestants)
Chile (3 contestants)
Italy (3 contestants)
Nicaragua (3 contestants)
Portugal (3 contestants)
Taiwan (3 contestants)
Tunisia (3 contestants)
Turkey (3 contestants)
Argentina (2 contestants)
Bulgaria (2 contestants)
Hungary (2 contestants)
Israel (2 contestants)
Latvia (2 contestants)
Lithuania (2 contestants)
Morocco (2 contestants)
Nigeria (2 contestants)
Sweden (2 contestants)
Switzerland (2 contestants)
Vietnam (2 contestants)
Algeria (1 contestant)
Austria (1 contestant)
Belgium (1 contestant)
Colombia (1 contestant)
Cyprus (1 contestant)
Denmark (1 contestant)
Ecuador (1 contestant)
Estonia (1 contestant)
Greece (1 contestant)
Guatemala (1 contestant)
Iran (1 contestant)
Ireland (1 contestant)
Kenya (1 contestant)
Lebanon (1 contestant)
Malaysia (1 contestant)
Moldova (1 contestant)
New Zealand (1 contestant)
Norway (1 contestant)
Peru (1 contestant)
Philippines (1 contestant)
United Arab Emirates (1 contestant)
Venezuela (1 contestant)