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