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Problems solved

Qualification Round (1282 solutions by 458 contestants):
Round 1A (169 solutions by 110 contestants):
Round 1B (69 solutions by 45 contestants):
Round 1C (183 solutions by 117 contestants):
Round 2 (85 solutions by 35 contestants):
Round 3 (34 solutions by 18 contestants):
APAC Semifinal (7 solutions by 1 contestant):
AMER Semifinal (3 solutions by 3 contestants):
World Finals (5 solutions by 1 contestant):

Submission Origin

India (151 contestants)
China (52 contestants)
United States (52 contestants)
Brazil (47 contestants)
South Korea (20 contestants)
Taiwan (15 contestants)
Japan (14 contestants)
Canada (13 contestants)
Argentina (9 contestants)
Poland (9 contestants)
Thailand (9 contestants)
Spain (8 contestants)
Germany (7 contestants)
France (6 contestants)
Mexico (6 contestants)
Romania (6 contestants)
Russia (6 contestants)
Australia (5 contestants)
Netherlands (5 contestants)
Portugal (5 contestants)
Singapore (5 contestants)
United Kingdom (4 contestants)
Greece (3 contestants)
Hong Kong (3 contestants)
Italy (3 contestants)
Philippines (3 contestants)
Bulgaria (2 contestants)
Croatia (2 contestants)
Czech Republic (2 contestants)
Indonesia (2 contestants)
Ireland (2 contestants)
Slovakia (2 contestants)
South Africa (2 contestants)
Turkey (2 contestants)
Ukraine (2 contestants)
Austria (1 contestant)
Belgium (1 contestant)
Egypt (1 contestant)
Hungary (1 contestant)
Israel (1 contestant)
Peru (1 contestant)
Sweden (1 contestant)
Switzerland (1 contestant)
Tunisia (1 contestant)