Problems from 2016 ICPC North American Qualifier Contest

Languages
A New Alphabet0.0012217031756544%1.9Easyen
Arcade!0.01850140829721%5.9Harden
Big Truck0.004145718193834%3.4Mediumen
Brackets0.00573327744914%7.1Harden
Dots and Boxes0.00114834112336%5.1Mediumen
Free Desserts0.0113772804616%8.7Harden
Inverse Factorial0.007210168211921%5.3Mediumen
Nine Packs0.002833629110931%4.1Mediumen
Primonimo0.00137439815940%5.3Mediumen
Quick Estimates0.001314217782355%1.6Easyen
Robotopia0.00128616097216%5.7Harden
Unusual Darts0.011111111935231%4.9Mediumen