Problems from Google Code Jam Practice Problems

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Alien Numbers0.001256201307650%1.9Easyen
Shopping Plan0.0011201593925%7.6Harden
Square Fields (Easy)0.0077236714439%5.4Mediumen
Square Fields (Hard)0.0082470620629%6.9Harden