Problems by Greg Hamerly

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Adding Words 3630 786 22% 0.00 878 635 72% 4.2
All Different Directions 364 183 50% 0.00 184 161 88% 2.6
Bag of Tiles 212 72 34% 0.42 52 34 65% 7.2
BASIC Interpreter 344 47 14% 0.01 55 31 56% 6.0
Bounding Robots 1004 591 59% 0.00 542 508 94% 1.6
Cellular Merging 28 4 14% 0.43 5 2 40% 7.6
Charting Progress 555 275 50% 0.00 254 229 90% 2.6
Chatter 82 17 21% 0.21 17 12 71% 6.8
Checking For Correctness 421 89 21% 0.01 95 69 73% 6.1
Connect the Dots 191 65 34% 0.00 58 49 84% 3.6
Convex Polygon Area 395 260 66% 0.00 236 223 94% 2.0
Counting Stars 1958 670 34% 0.00 608 526 87% 2.9
Dart Scoring 92 27 29% 0.02 37 25 68% 5.9
Deduplicating Files 1218 360 30% 0.02 306 237 77% 3.7
Detailed Differences 2248 1368 61% 0.00 1290 1244 96% 1.4
Different Distances 1801 844 47% 0.00 773 728 94% 1.5
Engineering English 2270 1023 45% 0.00 949 808 85% 2.3
Enlarging Hash Tables 758 281 37% 0.01 228 186 82% 3.3
Erdős Numbers 241 60 25% 0.01 57 40 70% 6.7
Escape Plan 297 51 17% 0.02 51 36 71% 5.1
Estimating the Area of a Circle 1691 1139 67% 0.00 1068 1020 96% 1.4
Forest Fires 37 16 43% 0.28 17 12 71% 6.0
Functional Fun 311 161 52% 0.00 149 137 92% 2.4
Fundamental Neighbors 490 207 42% 0.01 162 133 82% 3.8
Generalized Recursive Functions 158 72 46% 0.32 52 43 83% 4.2
Genetic Search 291 151 52% 0.00 143 130 91% 2.1
Golomb Rulers 254 130 51% 0.03 136 112 82% 3.4
Hall O' Wee Mirrors 125 55 44% 0.01 47 38 81% 5.6
Heliocentric 803 482 60% 0.00 448 419 94% 1.8
Hitting the Targets 1027 597 58% 0.00 589 550 93% 1.7
How Many Digits? 2291 636 28% 0.00 569 434 76% 3.8
Hurricane Danger! 174 45 26% 0.00 62 42 68% 5.8
Image Decoding 675 189 28% 0.00 208 167 80% 3.3
In Or Out 838 300 36% 0.00 310 272 88% 2.9
Island Hopping 309 190 61% 0.04 138 117 85% 4.0
Juggling Patterns 153 47 31% 0.00 39 23 59% 8.0
Limited Correspondence 235 53 23% 0.09 47 32 68% 6.1
Loopy Cab Drivers 19 4 21% 0.04 4 4 100% 4.4
Loopy Transit 54 22 41% 0.00 26 21 81% 5.9
Managing Packaging 400 104 26% 0.01 126 70 56% 6.4
Matrix Inverse 1193 426 36% 0.00 436 358 82% 3.0
Maximizing (And Minimizing) Your Winnings 71 35 49% 0.22 35 28 80% 4.8
Maximizing Your Pay 78 21 27% 0.00 24 14 58% 7.2
Maze Movement 62 31 50% 0.06 31 26 84% 3.8
Metaprogramming 1094 434 40% 0.01 431 359 83% 2.9
Multi-Touch Gesture Classification 55 16 29% 0.00 18 16 89% 4.9
Musical Notation 461 223 48% 0.00 217 203 94% 2.0
Music Your Way 247 115 47% 0.00 113 99 88% 3.2
Name That Permutation 253 86 34% 0.00 90 69 77% 5.3
Notable Quotables 67 6 9% 0.02 14 5 36% 8.6
Oddities 9354 5420 58% 0.00 4962 4797 97% 1.2
Out of Context 21 4 19% 0.46 6 3 50% 7.7
Pachinko Probability 114 32 28% 0.01 36 28 78% 5.7
Pachyderm Peanut Packing 201 115 57% 0.00 113 102 90% 2.4
Page Layout 40 14 35% 0.08 13 12 92% 4.6
Parallel Analysis 66 22 33% 1.37 21 14 67% 6.7
Parsing Hex 897 260 29% 0.00 268 236 88% 2.5
Permutation Encryption 1625 621 38% 0.00 663 566 85% 2.6
Polish Notation 136 43 32% 0.00 48 38 79% 4.1
Preludes 794 454 57% 0.00 442 417 94% 1.6
Primal Representation 977 255 26% 0.03 187 144 77% 5.0
Prime Reduction 606 222 37% 0.07 174 136 78% 4.1
Prime Spiral 224 98 44% 0.00 72 69 96% 2.5
Quick Estimates 4074 2265 56% 0.00 2162 2039 94% 1.5
Quite a Problem 1719 686 40% 0.00 668 609 91% 1.8
Race Day 125 55 44% 0.01 49 42 86% 4.3
Reachable Roads 314 151 48% 0.00 142 126 89% 2.4
Reversing Roads 213 76 36% 0.00 75 65 87% 4.0
Robot Protection 85 33 39% 0.03 36 30 83% 3.1
Saving Daylight 1096 618 56% 0.00 572 530 93% 1.7
Secure Doors 1908 890 47% 0.00 907 820 90% 1.9
Self-Similar Strings 226 116 51% 0.04 90 76 84% 3.8
Selling Spatulas 293 35 12% 0.03 47 20 43% 6.8
Sierpiński Circumference 993 393 40% 0.00 337 301 89% 2.4
Sneak Attack 155 5 3% 0.02 18 5 28% 9.1
Sort of Sorting 2417 867 36% 0.01 796 623 78% 2.9
Statistics 2646 1247 47% 0.00 1228 1130 92% 1.7
Stirling's Approximation 451 190 42% 0.00 86 67 78% 5.0
Structural Differences 32 6 19% 0.05 11 6 55% 5.8
Sudokunique 499 83 17% 0.01 64 34 53% 8.2
Support Vector Machine 694 169 24% 0.03 190 113 59% 6.6
Surveillance Squared 108 15 14% 0.05 25 13 52% 6.9
Synchronizing Lists 1375 858 62% 0.00 811 760 94% 1.6
Texture Analysis 510 228 45% 0.00 217 190 88% 2.6
The Rectangles Are Surrounding Us! 221 97 44% 0.00 99 78 79% 3.8
Transportation Planning 45 22 49% 0.08 16 15 94% 4.7
Unicycle Counting 82 19 23% 0.00 28 17 61% 7.0
Variable Arithmetic 310 135 44% 0.00 138 125 91% 2.3
Volume Amplification 72 16 22% 0.69 21 14 67% 5.6
Where to Live? 254 80 31% 0.01 64 49 77% 3.5