Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
0-1 Sequences 3814 598 16% 0.01 765 408 53% 7.1
A+B Problem 3628 357 10% 0.04 539 185 34% 8.4
Boxes 1069 377 35% 0.10 246 205 83% 4.3
Classrooms 782 205 26% 0.08 170 120 71% 6.5
Crazy Driver 590 236 40% 0.00 185 160 86% 3.8
Curious Cupid 1070 166 16% 0.08 139 90 65% 6.6
Dim Sum 57 29 51% 0.04 26 22 85% 6.5
k-Colouring of a Graph 141 38 27% 0.03 25 19 76% 7.9
Let's Meet 462 76 16% 0.00 65 42 65% 7.4
Palindromes 211 44 21% 0.09 55 26 47% 8.8
Take Two Stones 13307 8399 63% 0.00 6862 6607 96% 1.2