Problems from Programming Battle, contest Beta

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Coupons	0.04	841	40	15	38%	9.1Hard	en
Forest Construction	0.00	641	66	48	73%	7.6Hard	en
Horse in Ambush	0.00	411	54	19	35%	9.0Hard	en