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
scicom 18
basketball_cpic 14
dayum 13
prime 12
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Most Submitted Problems (Past Week)
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fibo 73
deciphering_zane_ex 71
bombardirocrocodilo 48
wrongreverse 45
leftout 45