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