Problems from CTU Open 2005

Name
Fastest
Shortest
Authors
Full Solves
Ratio
Difficulty
Languages
All Friends0.0068524712852%8.4Harden
Divisors0.0013371452774%5.2Mediumen
Emag Eht Htiw Em Pleh0.0028793889195%1.9Easyen
Failing Roads0.04384342368%6.9Harden
Help Me With The Game0.004351152101588%2.8Mediumen