Problems from North American Invitational Programming Contest 2018

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Cut It Out! 93 51 55% 0.03 38 32 84% 3.2
Double Clique 262 68 26% 0.01 80 56 70% 6.1
Flashing Fluorescents 477 166 35% 0.00 129 100 78% 3.8
Missing Gnomes 1445 568 39% 0.01 426 377 88% 2.3
Prefix Free Code 1635 338 21% 0.04 267 173 65% 6.4
Probe Droids 250 50 20% 0.00 69 31 45% 6.4
Rainbow Graph 41 15 37% 0.01 18 11 61% 6.0
Recovery 724 223 31% 0.00 204 164 80% 4.5
Red Black Tree 557 207 37% 0.09 128 110 86% 3.5
Winter Festival 36 12 33% 0.07 20 11 55% 6.6
Zoning Houses 876 256 29% 0.09 206 145 70% 5.6