Problems from Nordic Collegiate Programming Contest (NCPC) 2013

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Boiling Vegetables	1065	401	38%	0.00	346	295	85%	3.2
Cliff Walk	46	22	48%	0.01	25	20	80%	6.9
Dance Reconstruction	130	25	19%	0.00	36	24	67%	6.8
Dartboard	404	126	31%	0.00	114	95	83%	4.6
Erase Securely	3693	1950	53%	0.00	1830	1708	93%	1.7
Number Trick	1302	231	18%	0.00	273	161	59%	6.9
Pinball	544	92	17%	0.07	102	43	42%	7.9
Planting Trees	6678	3235	48%	0.00	2855	2575	90%	2.0
Robert Hood	1997	530	27%	0.02	413	294	71%	5.1
Timebomb	1994	1031	52%	0.00	988	934	95%	1.7
Virus Replication	2977	711	24%	0.00	658	535	81%	3.9