Problems from North American Invitational Programming Contest (NAIPC) 2018

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Cut It Out! 123 58 47% 0.03 48 36 75% 5.3
Double Clique 316 81 26% 0.01 90 61 68% 8.3
Flashing Fluorescents 549 186 34% 0.00 147 112 76% 6.5
Missing Gnomes 1968 763 39% 0.01 527 465 88% 2.5
Prefix Free Code 1829 387 21% 0.04 288 192 67% 7.0
Probe Droids 310 64 21% 0.00 77 39 51% 7.9
Rainbow Graph 82 37 45% 0.01 33 20 61% 4.5
Recovery 954 275 29% 0.00 224 180 80% 5.5
Red Black Tree 715 285 40% 0.04 152 129 85% 5.2
Winter Festival 44 16 36% 0.07 23 14 61% 6.7
Zoning Houses 1010 298 30% 0.09 228 158 69% 6.7