Problems by Piotr Rudnicki

Name Fastest Shortest Total Acc. Ratio Difficulty Languages
A Flea on a Chessboard 0.01 430 1123 240 21% 5.6Hard en
Antiarithmetic? 0.01 326 2412 444 18% 7.3Hard en
Ants 0.00 152 5738 2664 46% 2.3Easy en
Bachet's Game 0.04 288 4721 1925 41% 3.5Medium en
Basic Remains 0.01 123 1270 580 46% 3.2Medium en
Brownie Points I 0.02 239 679 407 60% 2.3Easy en
Brownie Points II 0.11 1491 39 10 26% 7.6Hard en
Closest Sums 0.00 352 7752 2814 36% 2.5Easy en
Cutting a polygon 0.00 2053 260 46 18% 7.5Hard en
Ferry Loading IV 0.00 341 4269 1485 35% 2.8Medium en
Grid Speed 0.04 2453 87 12 14% 7.2Hard en
How many 0's? 0.00 230 1330 630 47% 4.1Medium en
Knights in Fen 0.00 780 3040 1024 34% 3.6Medium en
Magic Bitstrings 0.00 218 131 54 41% 6.4Hard en
Marbles On A Tree 0.00 498 2115 814 38% 2.9Medium en
Persistent Numbers 0.02 190 1170 434 37% 4.0Medium en
Rectilinear Polygon 0.01 953 77 32 42% 5.1Medium en
Three Powers 0.00 124 3302 1571 48% 2.2Easy en
Tri Tiling 0.00 70 2322 993 43% 2.5Easy en
Watering Grass 0.02 429 5858 1285 22% 5.2Medium en