Problems from 2020 ICPC North America Regionals (March 6 2021)

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Ant Typing 529 144 27% 0.02 238 132 55% 6.2
Bad Packing 551 101 18% 0.00 230 91 40% 8.1
Basic Basis 139 29 21% 0.01 38 24 63% 7.4
Bitonic Ordering 354 84 24% 0.04 126 63 50% 7.1
Condorcet 84 22 26% 0.00 35 13 37% 9.1
Derangement Rotations 56 33 59% 0.00 27 22 81% 6.1
Dominating Duos 546 109 20% 0.08 214 87 41% 7.8
Exam Manipulation 851 241 28% 0.00 340 207 61% 5.7
Exciting Tournament 68 37 54% 0.01 37 29 78% 6.7
Kth Subtree 209 37 18% 0.06 50 31 62% 8.8
Longest Common Subsequence 351 151 43% 0.00 185 131 71% 5.7
Magic Trick 2688 1903 71% 0.00 1826 1751 96% 1.4
Missing Number 1191 439 37% 0.00 505 402 80% 3.2
No Thanks! 954 525 55% 0.00 513 461 90% 2.3
Painted Corridors 118 45 38% 0.06 37 26 70% 6.7
Rainbow Numbers 315 81 26% 0.00 122 73 60% 7.0
Rating Problems 4232 2677 63% 0.00 2569 2485 97% 1.3
Smoothie Stand 374 234 63% 0.00 231 205 89% 2.8
Triangular Collection 312 121 39% 0.00 172 118 69% 6.4
TripTik 201 55 27% 0.80 49 35 71% 7.2
Unread Messages 1112 317 29% 0.00 440 296 67% 4.6