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Problems solved

Qualification Round (4160 solutions by 1168 contestants):
Round 1A (628 solutions by 260 contestants):
  • The Last Word: 245 small solutions, 206 large solutions.
  • Rank and File: 85 small solutions, 73 large solutions.
  • BFFs: 13 small solutions, 6 large solutions.
Round 1B (320 solutions by 151 contestants):
Round 1C (261 solutions by 130 contestants):
Round 2 (27 solutions by 12 contestants):
Round 3 (4 solutions by 2 contestants):

Submission Origin

India (675 contestants)
United States (68 contestants)
South Korea (59 contestants)
Brazil (41 contestants)
Taiwan (34 contestants)
China (25 contestants)
France (25 contestants)
Canada (24 contestants)
Japan (22 contestants)
Bangladesh (18 contestants)
Greece (12 contestants)
Romania (11 contestants)
Australia (10 contestants)
Italy (9 contestants)
Spain (9 contestants)
Thailand (9 contestants)
Czech Republic (8 contestants)
Hong Kong (8 contestants)
Turkey (8 contestants)
Portugal (7 contestants)
Russia (6 contestants)
United Kingdom (6 contestants)
Iran (5 contestants)
Argentina (4 contestants)
Germany (4 contestants)
Indonesia (4 contestants)
Mexico (4 contestants)
Morocco (4 contestants)
New Zealand (4 contestants)
Norway (4 contestants)
Philippines (4 contestants)
Singapore (4 contestants)
South Africa (4 contestants)
? (3 contestants)
Belgium (3 contestants)
Cameroon (3 contestants)
Croatia (3 contestants)
Malta (3 contestants)
Poland (3 contestants)
Sweden (3 contestants)
Switzerland (3 contestants)
Chile (2 contestants)
Egypt (2 contestants)
Hungary (2 contestants)
Israel (2 contestants)
Jamaica (2 contestants)
Ukraine (2 contestants)
Vietnam (2 contestants)
Afghanistan (1 contestant)
Algeria (1 contestant)
Antarctica (1 contestant)
Austria (1 contestant)
Azerbaijan (1 contestant)
Belarus (1 contestant)
Colombia (1 contestant)
Cyprus (1 contestant)
Finland (1 contestant)
Jordan (1 contestant)
Kuwait (1 contestant)
Latvia (1 contestant)
Malaysia (1 contestant)
Netherlands (1 contestant)
Pakistan (1 contestant)
Paraguay (1 contestant)
Peru (1 contestant)
Serbia (1 contestant)
Slovakia (1 contestant)
Sri Lanka (1 contestant)
Trinidad and Tobago (1 contestant)
Tunisia (1 contestant)