Problems from Olympiads

International Competitions

Competition Number of problems
IMO 320
Austrian-Polish 229
Asian-Pacific 95
Balkan 100
Baltic Way 280
Czech-Polish-Slovak Match 78
Hungary-Israel 106
Iberoamerican 144
Mediterranean 39
Nordic 96
Pan-African 30

National Competitions

Competition Number of problems
Austria 160
Belarus 232
Belgium 64
Bosnia & Hercegovina 78
Brazil 153
Bulgaria 686
Canada 238
China 140
Croatia 183
Czech Rep. & Slovakia 108
Estonia 72
Finland 16
France 123
Germany 293
Greece 104
Hong Kong 36
Hungary 132
India 227
Iran 176
Ireland 159
Israel 56
Italy 207
Japan 100
North Macedonia 37
Mexico 58
Moldova 357
Mongolia 108
The Netherlands 56
Norway 32
Poland 528
Romania 414
Russia 670
Serbia 582
Slovenia 114
South Korea 130
Spain 130
Sweden 90
Switzerland 81
Taiwan 69
Turkey 159
Ukraine 129
Vietnam 305

Thanks to the following people for reporting mistakes:

Babis Stergiou, Do Hoang Giang, Ercole Suppa, Francesco Morandin, Hae In Lee, Harun Šiljak, Juergen Voigt, Krzysztof Gogolews, Liu Guocan, Matti Lehtinen, Phan Anh Do, Philipp Dorsek, Shayan Dashmiz, and Yair Mulian.