Problems from North American Invitational Programming Contest (NAIPC) 2015

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Area of Effect 170 14 8% 1.38 29 12 41% 8.3
Canyon Mapping 84 13 15% 0.08 13 9 69% 7.6
Extensive Or 77 40 52% 0.00 38 33 87% 5.0
Magic Checkerboard 2200 377 17% 0.07 308 195 63% 7.0
Primal Partitions 699 224 32% 0.01 193 153 79% 5.4
Rainbow Zamboni 370 92 25% 0.02 84 58 69% 5.9
Sand Art 460 78 17% 0.04 78 59 76% 7.3
String Stretching 874 144 16% 0.00 195 83 43% 8.7
Vending Machine 637 92 14% 0.02 154 80 52% 8.2
Zig Zag Nametag 991 402 41% 0.00 406 344 85% 3.7