Problems from Google Code Jam Practice Problems

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Alien Numbers0.001255586274149%2.4Easyen
Shopping Plan0.0015141213126%8.0Harden
Square Fields (Easy)0.0081231513342%5.6Harden
Square Fields (Hard)0.0082461019432%7.1Harden