Problems from North American Invitational Programming Contest 2018

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Cut It Out! 89 47 53% 0.07 34 28 82% 4.2
Double Clique 190 46 24% 0.02 53 39 74% 5.9
Flashing Fluorescents 269 83 31% 0.00 82 59 72% 5.6
Missing Gnomes 913 365 40% 0.01 334 292 87% 2.3
Prefix Free Code 1205 236 20% 0.04 221 135 61% 7.2
Probe Droids 204 32 16% 0.00 52 22 42% 7.9
Rainbow Graph 37 12 32% 0.01 15 8 53% 6.9
Recovery 488 143 29% 0.00 154 121 79% 5.1
Red Black Tree 377 128 34% 0.09 97 82 85% 5.2
Winter Festival 28 10 36% 0.07 13 9 69% 6.1
Zoning Houses 516 139 27% 0.13 165 109 66% 6.5