Problems from Southwestern Europe Regional Contest (SWERC) 2016

Languages
Balls and Needles0.06901115536131%4.0Mediumen
Bribing Eve0.0278290420623%8.0Harden
Cairo Corridor0.0233431793520%8.2Harden
Candle Box0.00802211105148%2.4Easyen
Dinner Bet0.0012041256451%5.1Mediumen
Pascal's Hyper-Pyramids0.0023166130346%4.6Mediumen
Passwords0.0114141396345%6.5Harden
Performance Review0.05877114429125%6.5Harden
Risky Lottery0.00859633352%4.8Mediumen
The White Rabbit Pocket Watch0.0217043208326%4.3Mediumen
Within Arm's Reach0.007932274219%7.8Harden