Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
0-1 Sequences 10012 1505 15% 0.00 1987 1029 52% 5.8
A+B Problem 8771 863 10% 0.03 1230 411 33% 8.3
Boxes 1563 617 39% 0.06 403 335 83% 4.2
Classrooms 3203 600 19% 0.05 421 294 70% 6.2
Crazy Driver 810 315 39% 0.00 260 221 85% 3.9
Curious Cupid 1217 231 19% 0.08 187 127 68% 6.3
Dim Sum 95 38 40% 0.04 43 30 70% 7.0
k-Colouring of a Graph 208 50 24% 0.03 40 27 68% 8.8
Let's Meet 710 135 19% 0.00 97 61 63% 8.0
Palindromes 393 83 21% 0.09 99 41 41% 8.8
Take Two Stones 36507 21862 60% 0.00 18461 17750 96% 1.4