The answer to Part One of this contest is easy. It's just (A + B + 2)/C and that is quite easy to calculate, no?
NOTE: Each subpuzzle is self-contained; you will not need to rely on one to solve the others and you will not need to do anything with me to finish a subpuzzle. Once you've solved part one, go to flatluigi.googlepages.com/<your answer> for the next step. Page-guessers will find themselves at a severe disadvantage in part two.