Problems from CTU Open 2009

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Arable Area 358 86 24% 0.04 77 47 61% 8.4
Digital display 2858 967 34% 0.00 893 804 90% 2.3
Peculiar primes 795 253 32% 0.01 223 168 75% 5.9