Problems from Google Code Jam Practice Problems

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Alien Numbers0.001255599274849%2.4Easyen
Shopping Plan0.0011201293729%7.7Harden
Square Fields (Easy)0.0081231613442%5.6Harden
Square Fields (Hard)0.0082461419732%7.1Harden