Problems from Nordic Collegiate Programming Contest (NCPC) 2011

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Car Trouble	189	58	31%	0.00	59	52	88%	4.8
Death Knight Hero	3091	1667	54%	0.00	1575	1488	94%	1.5
Elevator Trouble	836	271	32%	0.00	235	204	87%	3.4
Enemy Division	156	54	35%	0.03	47	39	83%	4.6
Knigs of the Forest	312	99	32%	0.03	97	82	85%	4.8
ls	524	166	32%	0.00	169	129	76%	5.0
Mega Inversions	999	411	41%	0.01	312	261	84%	5.2
Prime Time	56	25	45%	0.00	26	20	77%	6.5
Private Space	136	16	12%	0.00	22	13	59%	6.8
Robots on a Grid	543	172	32%	0.02	125	105	84%	4.9