Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
0-1 Sequences 4157 641 15% 0.01 843 440 52% 7.2
A+B Problem 4114 383 9% 0.04 604 204 34% 8.4
Boxes 1116 394 35% 0.10 263 215 82% 4.4
Classrooms 815 214 26% 0.08 180 128 71% 6.4
Crazy Driver 598 242 40% 0.00 190 166 87% 3.6
Curious Cupid 1095 179 16% 0.08 154 102 66% 5.9
Dim Sum 61 31 51% 0.04 28 23 82% 7.3
k-Colouring of a Graph 141 38 27% 0.03 25 19 76% 8.0
Let's Meet 465 78 17% 0.00 67 44 66% 7.4
Palindromes 229 54 24% 0.09 62 28 45% 8.7
Take Two Stones 14996 9447 63% 0.00 7648 7357 96% 1.3