Problems from CTU Open 2009

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Arable Area 362 86 24% 0.04 79 47 59% 8.6
Digital display 3078 1057 34% 0.00 977 880 90% 2.2
Peculiar primes 845 267 32% 0.01 238 179 75% 6.0