Problems from CTU Open 2005

Name
Fastest
Shortest
Authors
Full Solves
Ratio
Difficulty
Languages
All Friends0.0064525513553%8.2Harden
Divisors0.0013375756975%4.9Mediumen
Emag Eht Htiw Em Pleh0.0028795090395%1.9Easyen
Failing Roads0.04384342471%6.2Harden
Help Me With The Game0.004321169103288%2.7Easyen