Problems from Alberta Collegiate Programming Contest 2021

Languages
Associative Exponents0.0090116728825%4.1Mediumen
Balls and Bins0.012731377253%4.7Mediumen
Beep Code0.012261628452%3.5Mediumen
Bitmask0.003821358764%3.6Mediumen
Colour Wars0.004550325651%3.0Mediumen
Compression0.06947753547%4.3Mediumen
Finding An A0.00912448700156%1.4Easyen
GCVWR0.00275323298956%1.4Easyen
Ghostbusters 30.009148218639%3.7Mediumen
Menu Updates0.021222239141%4.6Mediumen
Simone0.007683346055%1.9Easyen
Snakes and Masters0.004266127041%3.5Mediumen
Square Peg0.0045164793857%1.6Easyen
Swapping Places0.0211511533724%7.0Harden
Wonky Pizza0.002791405942%4.8Mediumen