Problems from Nordic Collegiate Programming Contest (NCPC) 2011

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Car Trouble	180	54	30%	0.00	55	48	87%	4.6
Death Knight Hero	2591	1408	54%	0.00	1354	1280	95%	1.5
Elevator Trouble	623	211	34%	0.00	189	162	86%	3.6
Enemy Division	133	41	31%	0.03	36	30	83%	5.9
Knigs of the Forest	258	93	36%	0.03	89	76	85%	4.0
ls	460	151	33%	0.00	147	116	79%	4.1
Mega Inversions	818	339	41%	0.01	269	227	84%	5.0
Prime Time	55	24	44%	0.00	25	19	76%	6.2
Private Space	75	12	16%	0.00	19	10	53%	7.9
Robots on a Grid	473	162	34%	0.02	111	96	86%	3.8