Problems from Google Code Jam Practice Problems

	Add	Remove

Name	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Alien Numbers	125	5992	2948	49%	2.1Easy	en
Shopping Plan	1120	143	37	26%	7.7Hard	en
Square Fields (Easy)	792	346	141	41%	5.7Hard	en
Square Fields (Hard)	824	683	202	30%	7.1Hard	en