Problems from Central Europe Regional Contest (CERC) 2013

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Bus	3538	1918	54%	0.00	1912	1766	92%	1.7
Captain Obvious and the Rabbit-Man	48	18	38%	0.53	20	16	80%	7.0
Chain & Co.	44	12	27%	0.84	15	11	73%	6.5
Crane	133	73	55%	0.02	46	43	93%	4.0
Digraphs	211	53	25%	0.00	60	46	77%	6.8
Draughts	178	84	47%	0.01	73	64	88%	4.6
Escape	342	48	14%	0.72	46	15	33%	8.4
Magical GCD	647	170	26%	0.26	146	109	75%	5.4
Rubik's Rectangle	43	10	23%	0.33	12	8	67%	7.8
Subway	73	12	16%	0.68	19	10	53%	8.5
What does the fox say?	7051	3076	44%	0.00	2777	2520	91%	2.0