Problems from CTU Open 2009

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Arable Area 265 65 25% 0.04 65 42 65% 7.8
Digital display 1716 588 34% 0.00 519 466 90% 2.5
Peculiar primes 526 167 32% 0.01 154 113 73% 6.1