Problems from North American Invitational Programming Contest (NAIPC) 2015

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Area of Effect 157 11 7% 1.93 23 9 39% 8.5
Canyon Mapping 80 11 14% 0.08 11 7 64% 7.8
Extensive Or 67 34 51% 0.00 32 27 84% 5.5
Magic Checkerboard 1124 172 15% 0.07 231 147 64% 7.4
Primal Partitions 629 198 31% 0.01 167 130 78% 5.5
Rainbow Zamboni 315 72 23% 0.03 77 52 68% 6.0
Sand Art 407 68 17% 0.04 70 53 76% 6.3
String Stretching 795 116 15% 0.00 170 72 42% 8.7
Vending Machine 577 82 14% 0.02 143 72 50% 8.4
Zig Zag Nametag 875 354 40% 0.00 359 305 85% 3.6