Problems by Piotr Rudnicki

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
A Flea on a Chessboard 397 83 21% 0.01 93 68 73% 5.3
Antiarithmetic? 1272 240 19% 0.01 301 174 58% 7.1
Ants 3308 1450 44% 0.00 1172 1022 87% 2.7
Bachet's Game 1963 1059 54% 0.08 715 663 93% 2.1
Basic Remains 460 207 45% 0.01 175 156 89% 3.4
Brownie Points I 272 155 57% 0.02 138 126 91% 2.4
Brownie Points II 30 6 20% 0.11 8 4 50% 7.2
Closest Sums 3794 1419 37% 0.00 1152 1000 87% 3.1
Cutting a polygon 241 42 17% 0.00 45 29 64% 7.7
Ferry Loading IV 2818 816 29% 0.00 869 619 71% 4.1
Grid Speed 15 3 20% 0.04 5 3 60% 6.6
How many 0's? 870 379 44% 0.00 341 260 76% 4.1
Knights in Fen 1712 617 36% 0.00 315 270 86% 3.1
Magic Bitstrings 99 43 43% 0.00 38 32 84% 4.4
Marbles On A Tree 973 368 38% 0.00 263 234 89% 3.0
Persistent Numbers 518 225 43% 0.02 181 149 82% 3.8
Rectilinear Polygon 43 15 35% 0.01 17 13 76% 6.4
Three Powers 1794 880 49% 0.00 719 664 92% 2.5
Tri Tiling 1190 535 45% 0.00 436 407 93% 2.1
Watering Grass 2199 474 22% 0.02 373 278 75% 5.8