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
belittle 19
snowball 17
numbergame 17
addition 15
potatosalad 14

Most Submitted Problems (Past Week)
Problem Submissions
nostatement 207
firefighting 104
fraud 87
guessproblem 86
fibo 74