Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
0-1 Sequences 11834 1855 16% 0.00 2428 1280 53% 6.3
A+B Problem 9750 982 10% 0.03 1396 465 33% 8.1
Boxes 1791 709 40% 0.06 484 403 83% 4.2
Classrooms 3745 706 19% 0.05 511 362 71% 6.4
Crazy Driver 858 329 38% 0.00 275 233 85% 4.0
Curious Cupid 1253 240 19% 0.08 196 135 69% 6.1
Dim Sum 103 39 38% 0.04 46 31 67% 7.5
k-Colouring of a Graph 219 54 25% 0.03 42 29 69% 9.0
Let's Meet 733 143 20% 0.00 103 65 63% 8.4
Palindromes 528 96 18% 0.09 138 46 33% 8.4
Take Two Stones 45316 26961 59% 0.00 22691 21793 96% 1.4