Foreword This team I participated with a team of Year 4 friends of mine in NUS Greyhats. Biggest thanks to mechfrog88, davidtan0527 and DarkPermafrost for basically carrying me through this. Qualifiers A bit rough for us here. One crypto challenge got the flag leaked, hence all teams solved it. I managed to solve one misc challenge about finding the kth digit after the decimal point of a fraction a/b with a, b, k being very large integers.