Problems from Central Europe Regional Contest (CERC) 2013

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Bus	3178	1736	55%	0.00	1746	1607	92%	1.7
Captain Obvious and the Rabbit-Man	47	17	36%	0.53	19	15	79%	7.0
Chain & Co.	43	11	26%	0.84	14	10	71%	7.1
Crane	122	66	54%	0.02	41	38	93%	4.3
Digraphs	204	47	23%	0.00	56	41	73%	8.0
Draughts	170	77	45%	0.01	66	57	86%	5.2
Escape	340	47	14%	0.72	44	14	32%	8.7
Magical GCD	447	123	28%	0.27	116	90	78%	5.2
Rubik's Rectangle	43	10	23%	0.33	12	8	67%	7.8
Subway	66	11	17%	0.68	17	9	53%	7.9
What does the fox say?	5879	2681	46%	0.00	2467	2238	91%	1.9