Problems by Ulf Lundström

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
A1 Paper 6912 2086 30% 0.00 2073 1652 80% 3.7
Alphabet Animals 8405 1549 18% 0.00 1367 979 72% 6.4
Black Friday 9283 3565 38% 0.00 3530 3097 88% 2.2
Card Hand Sorting 763 299 39% 0.00 244 204 84% 4.1
Car Game 2461 686 28% 0.10 469 301 64% 6.0
Coast Length 7744 2869 37% 0.01 2055 1753 85% 3.7
Erase Securely 6570 3401 52% 0.00 3123 2926 94% 1.7
Exhaustive Experiment 263 58 22% 0.04 64 46 72% 6.3
Falling Mugs 4323 1113 26% 0.00 981 827 84% 3.9
Flag Quiz 1086 374 34% 0.00 347 291 84% 4.1
Galactic Warlords 614 143 23% 0.00 171 124 73% 6.4
Kayaking Trip 1718 534 31% 0.01 453 364 80% 4.6
Kindergarten Excursion 2634 875 33% 0.00 709 594 84% 3.9
Lifting Walls 4449 1060 24% 0.00 877 740 84% 4.3
Luggage 339 60 18% 0.06 53 41 77% 6.4
Number Trick 1893 306 16% 0.00 365 212 58% 7.2
Proteins 221 65 29% 0.01 66 53 80% 5.7
Restaurant Orders 8843 1831 21% 0.01 1285 984 77% 5.4
Tomography 1827 476 26% 0.00 371 306 82% 3.9
Tomosynthesis 106 35 33% 0.00 29 26 90% 4.8
Vacuum Tubes 290 84 29% 0.00 82 63 77% 6.2
Virus Replication 6175 1503 24% 0.00 1262 1048 83% 3.8
X-ray spectrum 198 48 24% 0.00 51 43 84% 5.7