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
wrongreverse 20
mirrors 20
scicom 17
basketball_cpic 16
fibo 15

Most Submitted Problems (Past Week)
Problem Submissions
wrongreverse 97
lunchbox 89
mirrors 82
fibo 77
deciphering_zane_ex 71