Problems by Lewin Gan

Name Fastest Total Acc. Ratio Difficulty
AND Permutation 0.22 188 35 19% 8.5hard
Archery Accuracy 0.01 43 13 30% 4.9medium
Avoiding Airports 0.08 981 187 19% 7.0hard
Circle of Friends 0.15 280 71 25% 6.7hard
Cookie Cutter 1.81 165 34 21% 6.3hard
Double Sort 0.38 37 7 19% 8.1hard
Early Orders 0.01 397 114 29% 5.7hard
Ketek Counting 0.06 75 27 36% 7.3hard
Leaderboard Effect 0.76 69 34 49% 4.6medium
Permutation CFG 0.25 39 14 36% 6.9hard
Problem Set Construction 0.01 28 18 64% 3.8medium
Rainbow Roads 0.02 735 220 30% 5.9hard
Special Cycle 0.01 34 3 9% 8.7hard
Token Game 0.24 49 20 41% 7.6hard
XOR Island 0.00 120 37 31% 6.7hard