Problems from North American Invitational Programming Contest 2015

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Area of Effect 78 8 10% 4.74 13 6 46% 7.8
Canyon Mapping 64 8 12% 0.85 6 4 67% 6.5
Extensive Or 40 22 55% 0.17 20 19 95% 4.4
Magic Checkerboard 782 120 15% 0.10 163 103 63% 7.1
Primal Partitions 494 141 29% 0.01 125 99 79% 5.1
Rainbow Zamboni 274 54 20% 0.04 63 41 65% 6.5
Sand Art 322 56 17% 0.07 51 42 82% 5.8
String Stretching 607 86 14% 0.01 123 50 41% 8.6
Vending Machine 410 52 13% 0.03 106 49 46% 8.6
Zig Zag Nametag 555 219 39% 0.00 230 200 87% 3.4