Problems from North American Invitational Programming Contest (NAIPC) 2015

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Area of Effect 172 15 9% 1.38 31 13 42% 8.2
Canyon Mapping 108 18 17% 0.06 15 11 73% 7.3
Extensive Or 123 75 61% 0.00 55 50 91% 3.5
Magic Checkerboard 2783 489 18% 0.07 383 251 66% 7.0
Primal Partitions 791 261 33% 0.01 225 183 81% 5.4
Rainbow Zamboni 506 122 24% 0.02 111 76 68% 6.4
Sand Art 613 111 18% 0.04 98 77 79% 6.1
String Stretching 1111 200 18% 0.00 234 104 44% 8.7
Vending Machine 683 103 15% 0.02 168 91 54% 8.2
Zig Zag Nametag 1164 480 41% 0.00 482 407 84% 3.9