Problems by Ulf Lundström

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
A1 Paper	3767	1118	30%	0.00	1100	862	78%	3.8
Black Friday	5635	2153	38%	0.00	2148	1868	87%	2.1
Card Hand Sorting	578	224	39%	0.00	183	155	85%	3.8
Car Game	2048	549	27%	0.10	380	234	62%	5.8
Coast Length	4950	1825	37%	0.02	1268	1077	85%	3.3
Erase Securely	3693	1950	53%	0.00	1830	1708	93%	1.7
Falling Mugs	2283	576	25%	0.00	529	458	87%	3.3
Flag Quiz	360	119	33%	0.00	134	107	80%	4.4
Galactic Warlords	452	104	23%	0.00	128	93	73%	6.5
Kayaking Trip	704	256	36%	0.01	212	171	81%	5.1
Kindergarten Excursion	1274	442	35%	0.00	364	302	83%	4.2
Lifting Walls	2492	632	25%	0.00	490	421	86%	3.5
Luggage	285	47	16%	0.06	39	30	77%	7.2
Number Trick	1302	231	18%	0.00	273	161	59%	6.9
Proteins	154	50	32%	0.01	49	39	80%	5.7
Restaurant Orders	4083	740	18%	0.01	615	467	76%	4.9
Tomography	1106	282	25%	0.00	193	151	78%	4.0
Tomosynthesis	46	20	43%	0.00	20	17	85%	5.9
Vacuum Tubes	258	72	28%	0.01	68	52	76%	5.5
Virus Replication	2977	711	24%	0.00	658	535	81%	3.9
X-ray spectrum	163	37	23%	0.00	38	33	87%	4.3