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Problems solved

Qualification Round (4377 solutions by 1005 contestants):
Round 1A (866 solutions by 321 contestants):
  • The Last Word: 315 small solutions, 293 large solutions.
  • Rank and File: 112 small solutions, 97 large solutions.
  • BFFs: 32 small solutions, 17 large solutions.
Round 1B (688 solutions by 287 contestants):
Round 1C (494 solutions by 213 contestants):
Round 2 (123 solutions by 40 contestants):
Round 3 (12 solutions by 4 contestants):

Submission Origin

United States (153 contestants)
India (116 contestants)
United Kingdom (40 contestants)
Pakistan (39 contestants)
Canada (38 contestants)
Japan (38 contestants)
Russia (35 contestants)
Poland (34 contestants)
Brazil (28 contestants)
Hungary (27 contestants)
Israel (27 contestants)
Germany (25 contestants)
Ukraine (25 contestants)
Australia (22 contestants)
Egypt (22 contestants)
France (21 contestants)
China (17 contestants)
Netherlands (17 contestants)
South Africa (16 contestants)
Spain (16 contestants)
Italy (15 contestants)
Iran (13 contestants)
New Zealand (13 contestants)
Denmark (10 contestants)
Hong Kong (10 contestants)
Romania (10 contestants)
South Korea (10 contestants)
Turkey (10 contestants)
Thailand (9 contestants)
Austria (8 contestants)
Belarus (8 contestants)
Colombia (8 contestants)
Czech Republic (8 contestants)
Mexico (8 contestants)
Vietnam (8 contestants)
Lithuania (7 contestants)
Sweden (7 contestants)
Indonesia (6 contestants)
Nigeria (6 contestants)
Belgium (5 contestants)
Bulgaria (5 contestants)
Taiwan (5 contestants)
Estonia (4 contestants)
Greece (4 contestants)
Portugal (4 contestants)
Slovakia (4 contestants)
Sri Lanka (4 contestants)
Croatia (3 contestants)
Latvia (3 contestants)
Lebanon (3 contestants)
Malaysia (3 contestants)
Moldova (3 contestants)
Morocco (3 contestants)
Serbia (3 contestants)
Singapore (3 contestants)
Slovenia (3 contestants)
Switzerland (3 contestants)
Argentina (2 contestants)
Chile (2 contestants)
Dominican Republic (2 contestants)
Georgia (2 contestants)
Kazakhstan (2 contestants)
Philippines (2 contestants)
Tunisia (2 contestants)
Uruguay (2 contestants)
? (1 contestant)
Afghanistan (1 contestant)
Algeria (1 contestant)
Armenia (1 contestant)
Azerbaijan (1 contestant)
Bahrain (1 contestant)
Bolivia (1 contestant)
Eritrea (1 contestant)
Ethiopia (1 contestant)
Finland (1 contestant)
Guatemala (1 contestant)
Guernsey (1 contestant)
Ireland (1 contestant)
Jordan (1 contestant)
Kenya (1 contestant)
Kosovo (1 contestant)
Kyrgyzstan (1 contestant)
Lesotho (1 contestant)
Macau (1 contestant)
Macedonia (1 contestant)
Nepal (1 contestant)
Togo (1 contestant)
Uganda (1 contestant)
Venezuela (1 contestant)