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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Most Attempted Problems (Past Week)
Problem Users
helloworld 41
shamelessad 36
evenorodd 32
exam 29
addition 27

Most Submitted Problems (Past Week)
Problem Submissions
foodchain 148
helloworld 119
photo 102
party_noi 97
addition 88