Problems from CTU Open 2010

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Arbitrage?0.014574590125727%3.8Mediumen
Bus Clock Display0.02299772710%7.8Harden
Bus Schedules0.0924151031313%8.4Harden
God Save the i-th Queen0.07433102135835%5.5Harden
Hack Around the Lock0.0614451602516%7.8Harden
Measuring Problem Difficulty0.043951696237%6.6Harden
The Easiest Problem Is This One0.00513983766355%1.5Easyen