Problem #1 United States
#1 Bulgaria
#1 Canada
#1 Cyprus
#1 Israel
#1 Lebanon
#1 Mexico
#1 Netherlands
#1 Singapore
#1 Slovenia
#1 Sweden
#2 Kazakhstan
#2 Nicaragua
#3 Fiji
#3 Indonesia
#4 Brunei Darussalam
#4 Malaysia
#5 Denmark
#6 El Salvador
#7 Australia
#7 New Zealand
#7 Thailand
#9 Philippines
#10 Nigeria
#11 Finland
#11 Norway
#14 Nicaragua
#16 Ecuador
#16 El Salvador
#17 Spain
#19 Jordan
#25 United Arab Emirates
#28 Brazil
#28 Greece
#29 Czech Republic
#29 Poland
#33 Hong Kong
#36 Austria
#42 Barbados
#50 Belgium
#59 Russia
#87 Italy
#90 Turkey
#100 Germany
#101 Switzerland
#107 South Africa
#177 France
#281 Japan