Problems by Ulf Lundström

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
A1 Paper	7561	2345	31%	0.00	2325	1866	80%	3.3
Alphabet Animals	10788	1917	18%	0.00	1602	1129	70%	5.2
Black Friday	10017	3908	39%	0.00	3847	3391	88%	2.0
Card Hand Sorting	784	308	39%	0.00	257	213	83%	4.1
Car Game	2593	739	28%	0.10	510	336	66%	5.7
Coast Length	8259	3074	37%	0.01	2230	1907	86%	3.4
Erase Securely	7174	3717	52%	0.00	3400	3183	94%	1.8
Exhaustive Experiment	308	69	22%	0.04	77	57	74%	7.0
Falling Mugs	4754	1219	26%	0.00	1101	920	84%	4.3
Flag Quiz	1270	462	36%	0.00	429	370	86%	3.7
Galactic Warlords	683	152	22%	0.00	182	130	71%	6.8
Kayaking Trip	1948	628	32%	0.01	532	433	81%	4.7
Kindergarten Excursion	2947	972	33%	0.00	809	680	84%	3.7
Lifting Walls	4711	1126	24%	0.00	949	798	84%	4.4
Luggage	340	60	18%	0.06	54	41	76%	6.6
Number Trick	2039	350	17%	0.00	411	250	61%	6.8
Proteins	230	68	30%	0.01	70	55	79%	6.2
Restaurant Orders	9954	2086	21%	0.01	1492	1148	77%	5.5
Tomography	2063	538	26%	0.00	425	354	83%	3.9
Tomosynthesis	115	37	32%	0.00	32	28	88%	4.9
Vacuum Tubes	290	84	29%	0.00	82	63	77%	6.0
Virus Replication	6734	1669	25%	0.00	1427	1190	83%	3.6
X-ray spectrum	226	57	25%	0.00	58	49	84%	4.6