Problems by Piotr Rudnicki

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
A Flea on a Chessboard 481 107 22% 0.01 119 87 73% 5.4
Antiarithmetic? 1572 288 18% 0.01 353 205 58% 7.2
Ants 3794 1684 44% 0.00 1361 1192 88% 2.5
Bachet's Game 2356 1231 52% 0.08 806 747 93% 2.1
Basic Remains 554 241 44% 0.01 210 186 89% 3.6
Brownie Points I 345 197 57% 0.02 177 162 92% 2.3
Brownie Points II 40 8 20% 0.11 11 5 45% 8.0
Closest Sums 4435 1646 37% 0.00 1333 1164 87% 2.9
Cutting a polygon 294 43 15% 0.00 53 30 57% 8.5
Ferry Loading IV 3074 935 30% 0.00 974 717 74% 3.5
Grid Speed 15 3 20% 0.04 5 3 60% 6.6
How many 0's? 928 407 44% 0.00 372 280 75% 4.2
Knights in Fen 2000 699 35% 0.00 375 322 86% 3.2
Magic Bitstrings 103 46 45% 0.00 41 35 85% 4.1
Marbles On A Tree 1170 456 39% 0.00 309 277 90% 3.0
Persistent Numbers 608 261 43% 0.02 202 167 83% 3.8
Rectilinear Polygon 45 17 38% 0.01 19 15 79% 5.5
Three Powers 1988 955 48% 0.00 790 728 92% 2.5
Tri Tiling 1442 644 45% 0.00 532 496 93% 2.1
Watering Grass 2539 572 23% 0.02 440 340 77% 5.3