Problems by Ulf Lundström

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
A1 Paper	6405	1930	30%	0.00	1911	1525	80%	3.7
Alphabet Animals	3442	1010	29%	0.00	937	764	82%	3.4
Black Friday	8816	3373	38%	0.00	3356	2937	88%	2.2
Card Hand Sorting	759	295	39%	0.00	240	200	83%	4.1
Car Game	2447	681	28%	0.10	464	296	64%	5.9
Coast Length	7456	2758	37%	0.01	1961	1669	85%	3.6
Erase Securely	6093	3146	52%	0.00	2901	2715	94%	1.7
Exhaustive Experiment	216	44	20%	0.04	54	36	67%	7.0
Falling Mugs	4111	1052	26%	0.00	918	776	85%	3.6
Flag Quiz	968	331	34%	0.00	304	257	85%	3.9
Galactic Warlords	539	129	24%	0.00	153	113	74%	6.5
Kayaking Trip	1607	504	31%	0.01	425	341	80%	4.3
Kindergarten Excursion	2361	786	33%	0.00	637	533	84%	3.7
Lifting Walls	4142	983	24%	0.00	799	673	84%	4.4
Luggage	328	56	17%	0.06	48	37	77%	7.1
Number Trick	1741	298	17%	0.00	348	205	59%	7.0
Proteins	200	58	29%	0.01	60	47	78%	6.4
Restaurant Orders	8232	1697	21%	0.01	1167	894	77%	5.1
Tomography	1673	435	26%	0.00	342	279	82%	4.0
Tomosynthesis	94	32	34%	0.00	26	23	88%	4.9
Vacuum Tubes	279	79	28%	0.01	76	58	76%	6.5
Virus Replication	5990	1454	24%	0.00	1207	1006	83%	3.4
X-ray spectrum	194	46	24%	0.00	49	41	84%	5.7