Welcome to Codebreaker!

Codebreaker is the official platform for Singapore Informatics Olympiad training and contests. We have run selection for the International Olympiad in Informatics for the delegations of Singapore and Indonesia, as well as countless official national and school training programmes.

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Submissions Per Day
Most Attempted Problems (Past Week)
Problem Users
helloworld 25
addition 21
weddingcoins 16
lunchbox 14
uniquenumbers 14

Most Submitted Problems (Past Week)
Problem Submissions
sufferingprogrammer 113
addition 105
helloworld 82
squarerect 67
arrayfind 48