Problems from CTU Open 2010

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Arbitrage?0.014574590125827%3.8Mediumen
Bus Clock Display0.0229977879%8.1Harden
Bus Schedules0.0924151141311%8.7Harden
God Save the i-th Queen0.07433103535935%5.5Harden
Hack Around the Lock0.0614451692615%7.3Harden
Measuring Problem Difficulty0.043951806536%6.0Harden
The Easiest Problem Is This One0.00514045769055%1.6Easyen