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.

1987 problems

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Most Attempted Problems (Past Week)
Problem Users
helloworld 15
fibo 10
addition 10
rhythmscore 9
sumint 8

Most Submitted Problems (Past Week)
Problem Submissions
general 46
festival 46
fibo 40
sonictheparallelogram 39
binaryroads 34