Problems from Google Code Jam Practice Problems

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Alien Numbers0.001256236309450%1.9Easyen
Shopping Plan0.0011201794123%6.9Harden
Square Fields (Easy)0.0077237514739%5.2Mediumen
Square Fields (Hard)0.0082474221529%6.7Harden