Problems by Ulf Lundström

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
A1 Paper	3622	1076	30%	0.00	1052	830	79%	3.5
Black Friday	5509	2085	38%	0.00	2081	1805	87%	2.2
Card Hand Sorting	573	220	38%	0.00	179	151	84%	3.9
Car Game	2026	543	27%	0.10	375	229	61%	5.9
Coast Length	4819	1768	37%	0.02	1229	1048	85%	3.1
Erase Securely	3434	1839	54%	0.00	1726	1612	93%	1.6
Falling Mugs	2127	533	25%	0.00	492	424	86%	3.4
Flag Quiz	353	114	32%	0.00	129	102	79%	4.6
Galactic Warlords	450	104	23%	0.00	127	93	73%	6.0
Kayaking Trip	686	249	36%	0.01	209	168	80%	5.1
Kindergarten Excursion	1074	383	36%	0.00	330	266	81%	4.8
Lifting Walls	1799	472	26%	0.00	420	356	85%	3.8
Luggage	285	47	16%	0.06	39	30	77%	7.1
Number Trick	1107	194	18%	0.00	249	140	56%	7.0
Proteins	151	49	32%	0.01	48	38	79%	5.7
Restaurant Orders	3280	581	18%	0.01	529	393	74%	5.2
Tomography	1053	269	26%	0.00	179	142	79%	3.8
Tomosynthesis	46	20	43%	0.00	20	17	85%	5.9
Vacuum Tubes	254	71	28%	0.01	67	51	76%	5.5
Virus Replication	2728	665	24%	0.00	619	499	81%	4.0
X-ray spectrum	94	25	27%	0.00	26	22	85%	5.3