Problems by Ulf Lundström

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
A1 Paper	3354	976	29%	0.00	957	752	79%	3.6
Black Friday	4698	1871	40%	0.00	1868	1616	87%	2.5
Card Hand Sorting	559	216	39%	0.00	175	147	84%	3.9
Car Game	1990	524	26%	0.10	363	218	60%	6.0
Coast Length	4633	1695	37%	0.02	1169	998	85%	3.0
Erase Securely	3157	1709	54%	0.00	1600	1492	93%	1.7
Falling Mugs	2045	507	25%	0.00	466	401	86%	3.4
Flag Quiz	336	107	32%	0.00	121	95	79%	4.5
Galactic Warlords	434	99	23%	0.00	120	88	73%	5.8
Kayaking Trip	664	243	37%	0.01	202	163	81%	5.1
Kindergarten Excursion	780	255	33%	0.00	248	198	80%	4.8
Lifting Walls	1742	458	26%	0.00	407	345	85%	3.8
Luggage	280	46	16%	0.07	38	29	76%	7.3
Number Trick	1089	190	17%	0.00	242	136	56%	7.0
Proteins	148	48	32%	0.01	47	37	79%	5.9
Restaurant Orders	3089	517	17%	0.01	480	353	74%	5.4
Tomography	1002	259	26%	0.00	168	132	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	2661	643	24%	0.00	599	480	80%	4.0
X-ray spectrum	68	22	32%	0.00	23	20	87%	5.4