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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ny_mathexam 29
nylunchtime 27
helloworld 17
addition 16
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prefixsums 93
nprime2 71
addition 68
exam 60
ippt 55