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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scicom 213
dayum 209
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wrongreverse 184
eatingparallelograms 166

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wrongreverse 1256
spreadsheet 1061
mirrors 857
rollercoaster 752
eatingparallelograms 693