Problems by Piotr Rudnicki

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
A Flea on a Chessboard 295 66 22% 0.01 80 59 74% 5.0
Antiarithmetic? 1178 221 19% 0.01 282 160 57% 7.2
Ants 3149 1390 44% 0.00 1112 975 88% 2.6
Bachet's Game 1889 1027 54% 0.08 690 641 93% 2.1
Basic Remains 366 159 43% 0.02 141 124 88% 3.7
Brownie Points I 236 136 58% 0.02 121 110 91% 2.4
Brownie Points II 30 6 20% 0.11 8 4 50% 7.3
Closest Sums 3438 1333 39% 0.00 1075 939 87% 3.1
Cutting a polygon 241 42 17% 0.00 45 29 64% 7.7
Ferry Loading IV 2427 752 31% 0.00 767 565 74% 3.3
Grid Speed 15 3 20% 0.04 5 3 60% 6.6
How many 0's? 847 373 44% 0.00 333 255 77% 4.0
Knights in Fen 1676 605 36% 0.00 303 260 86% 3.0
Magic Bitstrings 85 34 40% 0.00 37 31 84% 4.8
Marbles On A Tree 915 350 38% 0.00 252 225 89% 3.0
Persistent Numbers 504 216 43% 0.02 173 141 82% 3.9
Rectilinear Polygon 43 15 35% 0.01 17 13 76% 6.4
Three Powers 1740 846 49% 0.00 686 632 92% 2.6
Tri Tiling 1116 508 46% 0.00 411 382 93% 2.1
Watering Grass 2039 419 21% 0.02 348 258 74% 5.9