Problems from North American Invitational Programming Contest (NAIPC) 2019

Name Fastest Total Acc. Ratio Difficulty
Busy Board 0.01 612 101 17% 8.0hard
Cost of Living 0.01 415 52 13% 8.8hard
Cutting Strings 0.09 353 72 20% 8.7hard
Heaps of Fun 0.00 149 79 53% 6.1hard
Intersecting Rectangles 0.03 1650 478 29% 6.2hard
It's a Mod, Mod, Mod, Mod World 0.05 1338 257 19% 7.5hard
Knight of the Tarot Cards 4.33 294 63 21% 8.2hard
Monotony 0.61 326 149 46% 9.0hard
Piece of Cake 0.01 1206 301 25% 8.6hard
Planes, Trains, but not Automobiles 0.04 329 90 27% 7.9hard
Rocket Powered Hovercraft 0.00 328 80 24% 4.5medium
Subsequences in Substrings 0.01 1225 513 42% 5.0medium
XOR Sequences 0.00 387 153 40% 5.4medium