Problems by Ulf Lundström

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
A1 Paper	4226	1257	30%	0.00	1230	974	79%	3.5
Black Friday	5884	2266	39%	0.00	2259	1970	87%	2.1
Card Hand Sorting	587	229	39%	0.00	190	159	84%	4.0
Car Game	2122	561	26%	0.10	393	243	62%	5.9
Coast Length	5354	1946	36%	0.01	1365	1163	85%	3.2
Erase Securely	3926	2086	53%	0.00	1946	1822	94%	1.6
Falling Mugs	2392	613	26%	0.00	560	485	87%	3.3
Flag Quiz	389	138	35%	0.00	146	119	82%	4.2
Galactic Warlords	466	108	23%	0.00	132	97	73%	6.4
Kayaking Trip	827	287	35%	0.01	233	193	83%	5.1
Kindergarten Excursion	1397	493	35%	0.00	387	322	83%	4.2
Lifting Walls	2563	651	25%	0.00	510	437	86%	3.6
Luggage	286	48	17%	0.06	40	31	78%	7.4
Number Trick	1373	247	18%	0.00	287	171	60%	6.9
Proteins	156	52	33%	0.01	51	41	80%	5.6
Restaurant Orders	4395	816	19%	0.01	667	503	75%	4.8
Tomography	1214	317	26%	0.00	228	183	80%	3.9
Tomosynthesis	47	21	45%	0.00	21	18	86%	5.8
Vacuum Tubes	266	75	28%	0.01	71	55	77%	5.6
Virus Replication	3101	734	24%	0.00	688	554	81%	4.1
X-ray spectrum	166	38	23%	0.00	39	34	87%	4.5