Problems by Ulf Lundström

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
A1 Paper	4048	1211	30%	0.00	1181	935	79%	3.6
Black Friday	5769	2217	38%	0.00	2211	1925	87%	2.2
Card Hand Sorting	583	226	39%	0.00	187	156	83%	4.0
Car Game	2120	561	26%	0.10	392	243	62%	5.8
Coast Length	5252	1899	36%	0.01	1338	1137	85%	3.3
Erase Securely	3803	2020	53%	0.00	1893	1768	93%	1.7
Falling Mugs	2351	597	25%	0.00	550	475	86%	3.4
Flag Quiz	369	123	33%	0.00	138	111	80%	4.4
Galactic Warlords	460	107	23%	0.00	131	96	73%	6.4
Kayaking Trip	793	279	35%	0.01	224	185	83%	4.9
Kindergarten Excursion	1370	481	35%	0.00	379	315	83%	4.3
Lifting Walls	2555	648	25%	0.00	507	434	86%	3.6
Luggage	285	47	16%	0.06	39	30	77%	7.2
Number Trick	1336	239	18%	0.00	281	168	60%	6.9
Proteins	155	51	33%	0.01	50	40	80%	5.8
Restaurant Orders	4298	792	18%	0.01	644	485	75%	4.9
Tomography	1128	291	26%	0.00	203	159	78%	4.0
Tomosynthesis	46	20	43%	0.00	20	17	85%	5.9
Vacuum Tubes	265	74	28%	0.01	70	54	77%	5.6
Virus Replication	3087	730	24%	0.00	683	550	81%	4.1
X-ray spectrum	163	37	23%	0.00	38	33	87%	4.5