Problems by Greg Hamerly

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Adding Words 4055 889 22% 0.00 979 720 74% 3.7
All Different Directions 449 216 48% 0.00 207 182 88% 2.6
Bag of Tiles 218 72 33% 0.22 54 33 61% 7.7
BASIC Interpreter 375 49 13% 0.01 62 34 55% 6.6
Bounding Robots 1046 618 59% 0.00 568 533 94% 1.6
Cellular Merging 28 4 14% 0.25 5 2 40% 7.5
Charting Progress 627 313 50% 0.00 278 251 90% 2.6
Chatter 87 23 26% 0.15 20 15 75% 5.9
Checking For Correctness 426 94 22% 0.01 100 74 74% 5.7
Connect the Dots 302 119 39% 0.00 95 83 87% 3.8
Convex Polygon Area 457 287 63% 0.00 266 249 94% 2.0
Counting Stars 2084 722 35% 0.00 655 564 86% 2.9
Dart Scoring 126 30 24% 0.01 42 28 67% 6.6
Deduplicating Files 1539 399 26% 0.01 387 279 72% 4.4
Detailed Differences 2475 1508 61% 0.00 1422 1370 96% 1.4
Different Distances 1998 988 49% 0.00 859 806 94% 1.5
Engineering English 2438 1077 44% 0.00 1024 856 84% 2.4
Enlarging Hash Tables 807 302 37% 0.00 241 197 82% 3.3
Erdős Numbers 245 61 25% 0.01 59 41 69% 6.8
Escape Plan 313 57 18% 0.02 58 42 72% 5.1
Estimating the Area of a Circle 1925 1276 66% 0.00 1201 1149 96% 1.4
Forest Fires 40 18 45% 0.22 19 14 74% 5.6
Functional Fun 359 179 50% 0.00 167 155 93% 2.2
Fundamental Neighbors 530 206 39% 0.01 175 132 75% 4.9
Generalized Recursive Functions 192 78 41% 0.02 62 50 81% 4.7
Genetic Search 300 156 52% 0.00 150 134 89% 2.2
Golomb Rulers 316 181 57% 0.02 162 141 87% 3.3
Hall O' Wee Mirrors 127 57 45% 0.01 49 40 82% 5.3
Heliocentric 963 581 60% 0.00 546 512 94% 1.7
Hitting the Targets 1070 620 58% 0.00 611 567 93% 1.7
How Many Digits? 2575 699 27% 0.00 612 463 76% 3.9
Hurricane Danger! 182 47 26% 0.01 67 46 69% 5.1
Image Decoding 742 220 30% 0.00 221 180 81% 3.3
In Or Out 1144 365 32% 0.00 359 314 87% 2.9
Island Hopping 394 221 56% 0.03 165 135 82% 4.2
Juggling Patterns 153 47 31% 0.00 39 23 59% 8.1
Limited Correspondence 236 55 23% 0.05 48 33 69% 5.6
Loopy Cab Drivers 40 14 35% 0.03 10 10 100% 4.1
Loopy Transit 56 24 43% 0.00 28 23 82% 5.5
Managing Packaging 405 94 23% 0.01 128 63 49% 7.2
Matrix Inverse 1314 479 36% 0.00 484 403 83% 2.8
Maximizing (And Minimizing) Your Winnings 216 99 46% 0.13 78 66 85% 4.0
Maximizing Your Pay 80 22 28% 0.00 26 15 58% 7.5
Maze Movement 64 32 50% 0.06 33 27 82% 4.0
Metaprogramming 1356 506 37% 0.00 506 424 84% 2.8
Multi-Touch Gesture Classification 56 16 29% 0.00 19 16 84% 6.0
Musical Notation 483 238 49% 0.00 232 215 93% 2.1
Music Your Way 413 199 48% 0.00 171 152 89% 2.5
Name That Permutation 265 95 36% 0.00 98 76 78% 5.1
Notable Quotables 67 6 9% 0.01 14 5 36% 8.6
Oddities 10588 6093 58% 0.00 5486 5311 97% 1.2
Out of Context 21 4 19% 0.46 6 3 50% 7.6
Pachinko Probability 169 62 37% 0.00 56 48 86% 4.5
Pachyderm Peanut Packing 217 142 65% 0.00 127 119 94% 1.9
Page Layout 51 14 27% 0.02 15 12 80% 6.0
Parallel Analysis 68 24 35% 1.00 22 15 68% 6.4
Parsing Hex 979 290 30% 0.00 297 260 88% 2.6
Permutation Encryption 1834 705 38% 0.00 716 616 86% 2.4
Polish Notation 189 60 32% 0.00 66 55 83% 2.8
Preludes 894 503 56% 0.00 493 462 94% 1.7
Primal Representation 1017 237 23% 0.02 195 134 69% 6.5
Prime Reduction 672 244 36% 0.04 190 147 77% 4.1
Prime Spiral 234 101 43% 0.00 75 71 95% 2.7
Quick Estimates 4349 2425 56% 0.00 2295 2161 94% 1.5
Quite a Problem 1841 741 40% 0.00 716 650 91% 1.9
Race Day 128 57 45% 0.00 51 44 86% 4.1
Reachable Roads 359 169 47% 0.00 164 144 88% 2.5
Reversing Roads 293 99 34% 0.00 93 78 84% 4.1
Robot Protection 117 40 34% 0.04 45 36 80% 3.9
Saving Daylight 1155 639 55% 0.00 597 551 92% 1.7
Secure Doors 1991 937 47% 0.00 955 865 91% 1.8
Self-Similar Strings 233 121 52% 0.03 95 80 84% 3.9
Selling Spatulas 325 36 11% 0.03 49 21 43% 7.2
Sierpiński Circumference 1202 457 38% 0.00 403 358 89% 2.4
Sneak Attack 160 7 4% 0.00 20 7 35% 8.9
Sort of Sorting 3021 1048 35% 0.01 949 759 80% 2.6
Statistics 3267 1484 45% 0.00 1444 1321 91% 1.7
Stirling's Approximation 482 209 43% 0.00 93 72 77% 5.3
Structural Differences 32 6 19% 0.04 11 6 55% 5.9
Sudokunique 532 77 14% 0.01 71 34 48% 8.5
Support Vector Machine 746 185 25% 0.02 204 125 61% 6.0
Surveillance Squared 117 21 18% 0.02 30 18 60% 6.1
Synchronizing Lists 1707 1075 63% 0.00 996 936 94% 1.6
Texture Analysis 549 257 47% 0.00 238 209 88% 2.5
The Rectangles Are Surrounding Us! 227 101 44% 0.00 103 82 80% 3.8
Transportation Planning 63 23 37% 0.05 17 16 94% 4.8
Unicycle Counting 91 25 27% 0.00 32 21 66% 6.5
Variable Arithmetic 358 154 43% 0.00 158 141 89% 2.3
Volume Amplification 75 18 24% 0.33 23 15 65% 6.0
Where to Live? 308 95 31% 0.01 75 59 79% 3.0