Problem
#1 United States
#1 Australia
#1 Barbados
#1 Brazil
#1 Brunei Darussalam
#1 Bulgaria
#1 Canada
#1 Chile
#1 Cyprus
#1 Denmark
#1 Dominican Republic
#1 Egypt
#1 El Salvador
#1 Finland
#1 Greece
#1 Guatemala
#1 Indonesia
#1 Israel
#1 Kazakhstan
#1 Lebanon
#1 Macau
#1 Malaysia
#1 Mexico
#1 Netherlands
#1 New Zealand
#1 Norway
#1 Peru
#1 Philippines
#1 Poland
#1 Singapore
#1 Slovenia
#1 Sweden
#1 United Arab Emirates
#2 Argentina
#2 Costa Rica
#2 Czech Republic
#2 Hong Kong
#2 Latvia
#2 Lithuania
#2 Malta
#2 Portugal
#2 Thailand
#2 Turkey
#2 Venezuela
#2 Vietnam
#3 Ecuador
#3 Fiji
#3 Spain
#4 Slovakia
#6 Colombia
#8 Austria
#8 Hungary
#10 Saint Kitts and Nevis
#10 South Africa
#11 Bahrain
#11 Dominican Republic
#11 El Salvador
#11 Switzerland
#12 Argentina
#12 Belgium
#12 Nigeria
#13 Peru
#13 Zimbabwe
#15 Japan
#16 Germany
#17 Chile
#17 Italy
#17 The Bahamas
#18 India
#18 Portugal
#18 Russia
#19 Costa Rica
#19 France
#21 Panama
#24 Nicaragua
#31 Jordan
#32 Taiwan
#42 Azerbaijan
#58 Luxembourg
#70 Qatar
#122 Sri Lanka