Problems from Nordic Collegiate Programming Contest (NCPC) 2013

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Boiling Vegetables	1604	673	42%	0.00	594	506	85%	3.5
Cliff Walk	94	47	50%	0.01	51	42	82%	7.2
Dance Reconstruction	214	42	20%	0.00	60	37	62%	8.1
Dartboard	547	181	33%	0.00	169	144	85%	4.6
Erase Securely	7244	3768	52%	0.00	3446	3228	94%	1.8
Number Trick	2245	400	18%	0.00	462	295	64%	6.5
Pinball	901	152	17%	0.05	160	79	49%	8.9
Planting Trees	15008	6906	46%	0.00	5738	5219	91%	1.7
Robert Hood	4015	1219	30%	0.02	804	624	78%	4.6
Timebomb	3351	1796	54%	0.00	1677	1591	95%	1.7
Virus Replication	6855	1718	25%	0.00	1480	1237	84%	3.6