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 81
exam 76
area 75
sumint 73
addition 73

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exam 361
addition 347
lunchbox 317
typo 296
helloworld 273