Problems from CTU Open 2005

Name
Fastest
Shortest
Authors
Full Solves
Ratio
Difficulty
Languages
All Friends0.0064525213353%8.3Harden
Divisors0.0013373955275%5.0Mediumen
Emag Eht Htiw Em Pleh0.0028794990295%1.9Easyen
Failing Roads0.04384342471%6.2Harden
Help Me With The Game0.004321165102888%2.7Easyen