Problems from CTU Open 2005

Name
Fastest
Shortest
Authors
Full Solves
Ratio
Difficulty
Languages
All Friends0.0068524913052%8.3Harden
Divisors0.0013371853174%5.1Mediumen
Emag Eht Htiw Em Pleh0.0028794890195%1.9Easyen
Failing Roads0.04384352469%6.7Harden
Help Me With The Game0.004321163102688%2.7Easyen