Problems

 RSS feed for new problems
Submissions Users
Name Total Acc. Ratio Fastest   Total Acc. Ratio Difficulty
0-1 Sequences 10803 1689 16% 0.00 2190 1161 53% 5.5
2048 10226 4682 46% 0.00 4510 3864 86% 2.5
3D Printed Statues 13449 6191 46% 0.00 5777 5183 90% 2.0
3D Printer 942 156 17% 0.00 388 119 31% 8.8
3-Sided Dice 2828 231 8% 0.00 452 160 35% 8.7
4 thought 11704 4017 34% 0.00 3857 3260 85% 2.6
A1 Paper 6399 1927 30% 0.00 1909 1522 80% 3.7
Aaah! 34059 15870 47% 0.00 14245 13298 93% 1.5
ABC 18239 8322 46% 0.00 7853 7140 91% 1.7
Above Average 12150 5055 42% 0.00 4862 4368 90% 1.8
Abstract Art 445 147 33% 0.00 117 89 76% 5.7
Abstract Painting 956 396 41% 0.00 361 295 82% 3.8
Absurdistan Roads II 691 235 34% 0.00 232 155 67% 6.9
ACM Contest Scoring 8137 5091 63% 0.00 4553 4301 94% 1.5
Adding Words 13515 3340 25% 0.00 3160 2477 78% 3.5
A Different List Game 7445 515 7% 0.00 971 187 19% 9.3
A Different Problem 38769 14387 37% 0.00 13148 11412 87% 2.3
Adjoin the Networks 2461 648 26% 0.00 556 444 80% 5.6
Ads 798 75 9% 0.00 141 51 36% 5.7
Adventures in Moving -- Part IV 1745 386 22% 0.00 329 273 83% 4.5
A Favourable Ending 1881 515 27% 0.00 482 377 78% 4.3
A Feast For Cats 3254 1226 38% 0.00 876 753 86% 3.5
Air Conditioned Minions 6553 1913 29% 0.00 1977 1524 77% 2.9
Airport Logistics 70 18 26% 0.00 24 17 71% 6.9
Akcija 9252 4239 46% 0.00 3822 3425 90% 1.9
Alex and Barb 980 344 35% 0.00 390 307 79% 3.2
Alien Numbers 2831 1487 53% 0.00 1455 1332 92% 1.8
A List Game 10354 3155 30% 0.00 3006 2556 85% 2.5
All about that base 3237 1291 40% 0.00 1241 1050 85% 2.9
All Different Directions 1631 750 46% 0.00 711 634 89% 2.5
Allergy Test 633 158 25% 0.00 203 99 49% 8.0
All Friends 1133 214 19% 0.00 200 105 52% 8.8
All Kill 69 56 81% 0.00 41 35 85% 3.3
Alloys 731 262 36% 0.00 266 226 85% 3.7
All Pairs Shortest Path 13149 2478 19% 0.00 1575 1133 72% 5.5
Almost Perfect 11632 2648 23% 0.00 2740 2171 79% 3.4
Alphabet 2442 1248 51% 0.00 1176 1002 85% 2.9
Alphabet Animals 3439 1008 29% 0.00 936 763 82% 3.4
Alphabet Spam 10175 6332 62% 0.00 5335 5129 96% 1.3
Alternating Current 666 650 98% 0.00 109 107 98% 1.3 - 7.9
Alternative Anagram 242 78 32% 0.00 68 52 76% 7.1
Alternative Bracket Notation 220 94 43% 0.00 103 84 82% 5.3
Amsterdam Distance 2181 1076 49% 0.00 1092 934 86% 2.6
A Multiplication Game 1186 481 41% 0.00 514 400 78% 4.0
Anagram Counting 4523 1810 40% 0.00 1746 1472 84% 2.7
A New Adventure 1377 208 15% 0.00 216 151 70% 5.9
A New Alphabet 13132 5937 45% 0.00 5522 5109 93% 1.6
An I for an Eye 1158 326 28% 0.00 380 281 74% 4.7
Another Brick in the Wall 4068 2064 51% 0.00 2007 1834 91% 1.9
Another Candies 9623 2677 28% 0.00 2715 2274 84% 2.5
Another Coin Weighing Puzzle 527 149 28% 0.00 131 105 80% 6.3
Another Dice Game 117 76 65% 0.00 74 64 86% 4.2
Antenna Placement 189 79 42% 0.00 67 48 72% 7.8
Anthony and Cora 1124 293 26% 0.00 338 231 68% 5.7
Anthony and Diablo 4101 1501 37% 0.00 1522 1323 87% 2.5
Ants 4602 2104 46% 0.00 1719 1513 88% 2.4
Apaxiaaaaaaaaaaaans! 16327 9758 60% 0.00 8713 8318 95% 1.4
Apostrophe Catastrophe 144 37 26% 0.00 37 25 68% 6.5
Appalling Architecture 883 258 29% 0.00 230 190 83% 4.2
A Prize No One Can Win 5938 1829 31% 0.00 1501 1321 88% 2.4
Aquarium Tank 577 164 28% 0.00 158 123 78% 6.0
A Question of Ingestion 2099 488 23% 0.00 443 340 77% 5.5
A Random Problem 371 92 25% 0.00 88 61 69% 6.9
A Rational Sequence 1995 677 34% 0.00 726 531 73% 5.1
A Rational Sequence 2 2641 1955 74% 0.00 1729 1664 96% 1.5
A Rational Sequence (Take 3) 1205 972 81% 0.00 819 784 96% 1.7
Archimedes 31 5 16% 0.00 5 4 80% 5.7
Architecture 230 125 54% 0.00 131 119 91% 3.2
Arctic Network 2607 932 36% 0.00 707 583 82% 4.2
A Real Challenge 10594 5185 49% 0.00 4905 4609 94% 1.5
Are You Listening? 2568 824 32% 0.00 785 708 90% 2.5
Arithmetic 3700 1119 30% 0.00 1147 909 79% 3.5
Arithmetic Decoding 109 69 63% 0.00 56 51 91% 2.9
Army Strength (Easy) 4222 2149 51% 0.00 2008 1808 90% 2.2
Around and Around We Go 59 16 27% 0.00 27 15 56% 7.2
Around the Track 300 38 13% 0.00 60 28 47% 9.2
Arrangement 476 419 88% 0.00 356 353 99% 1.3 - 1.8
Array of Discord 3090 621 20% 0.00 563 403 72% 5.0
ASCII Addition 1502 870 58% 0.00 777 735 95% 1.8
ASCII Figure Rotation 2370 781 33% 0.00 807 684 85% 3.2
As Easy as CAB 1274 119 9% 0.00 277 92 33% 9.1
Aspen Avenue 2263 633 28% 0.00 423 283 67% 6.1
Association for Computing Machinery 2885 1105 38% 0.00 988 873 88% 2.6
Association for Cool Machineries (Part 2) 47 28 60% 0.00 32 25 78% 5.6
Association for the Country of Mububa 1992 406 20% 0.00 456 287 63% 7.2
Association of Myths 62 30 48% 0.00 36 28 78% 7.0
A Star not a Tree? 248 76 31% 0.00 62 44 71% 5.6
Asteroids 730 134 18% 0.00 105 75 71% 7.2
Astro 567 186 33% 0.00 180 153 85% 4.1
Astrological Sign 1033 445 43% 0.00 447 397 89% 1.7
A Towering Problem 2707 1318 49% 0.00 1324 1195 90% 2.1
Autori 27268 17174 63% 0.00 15398 14919 97% 1.2
Average Speed 1443 491 34% 0.00 493 411 83% 3.3
A Vicious Pikeman (Easy) 3015 1001 33% 0.00 775 681 88% 3.1
Avion 4301 2426 56% 0.00 2327 2237 96% 1.3
Baby Bites 4781 2467 52% 0.00 2343 2191 94% 1.6
Babylonian Numbers 1575 837 53% 0.00 835 751 90% 2.0
Backspace 14021 5265 38% 0.00 4031 3440 85% 2.4
Bacon, Eggs, and Spam 4678 2663 57% 0.00 2341 2180 93% 1.7
Baggage 345 117 34% 0.00 139 99 71% 5.5