Problems from CTU Open 2009

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Arable Area 298 68 23% 0.04 69 44 64% 8.2
Digital display 2318 797 34% 0.00 730 654 90% 2.4
Peculiar primes 669 203 30% 0.01 181 136 75% 5.9