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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helloworld 22
sumint 18
cooperation2 17
maximum 14
addition 14

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nicenumber 103
problemsetter 76
swords 67
prime 60
helloworld 60