Problems from North American Invitational Programming Contest 2017

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Apple Market 271 54 20% 0.19 67 31 46% 8.4
Blazing New Trails 382 39 10% 0.75 76 29 38% 8.1
Heaps from Trees 201 59 29% 0.24 85 50 59% 5.4
Incremental Double Free Strings 39 8 21% 0.01 15 8 53% 7.2
Maximum Color Clique 53 21 40% 0.04 24 17 71% 5.6
Pieces of Parentheses 757 136 18% 0.01 204 128 63% 7.2
Ski Resort 101 6 6% 0.68 8 4 50% 6.6
Stars in a Can 124 29 23% 0.19 31 22 71% 7.6
Stretching Streamers 244 94 39% 0.06 112 87 78% 4.5
Unbalanced Parentheses 6 5 83% 0.03 5 4 80% 5.8
Yin and Yang Stones 695 468 67% 0.00 456 426 93% 1.6