Problems from Central Europe Regional Contest (CERC) 2013

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Bus	2648	1547	58%	0.00	1549	1438	93%	1.7
Captain Obvious and the Rabbit-Man	41	16	39%	0.53	18	14	78%	7.1
Chain & Co.	39	10	26%	0.84	13	9	69%	7.2
Crane	99	54	55%	0.02	33	31	94%	4.6
Digraphs	182	43	24%	0.00	51	38	75%	7.1
Draughts	164	74	45%	0.01	62	54	87%	4.8
Escape	330	44	13%	0.72	41	12	29%	8.9
Magical GCD	411	114	28%	0.27	109	84	77%	5.7
Rubik's Rectangle	43	10	23%	0.33	12	8	67%	7.7
Subway	57	6	11%	0.86	13	6	46%	8.1
What does the fox say?	5110	2332	46%	0.00	2147	1940	90%	2.1