Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name Total Acc. Ratio Fastest Total Acc. Ratio Difficulty  
Take Two Stones 14933 9422 63% 0.00 7620 7333 96% 1.2
Crazy Driver 598 242 40% 0.00 190 166 87% 3.6
Boxes 1116 394 35% 0.10 263 215 82% 4.4
Curious Cupid 1095 179 16% 0.08 154 102 66% 5.9
Classrooms 815 214 26% 0.08 180 128 71% 6.4
0-1 Sequences 4153 641 15% 0.01 842 440 52% 7.2
Dim Sum 61 31 51% 0.04 28 23 82% 7.3
Let's Meet 465 78 17% 0.00 67 44 66% 7.4
k-Colouring of a Graph 141 38 27% 0.03 25 19 76% 8.0
A+B Problem 4114 383 9% 0.04 604 204 34% 8.4
Palindromes 229 54 24% 0.09 62 28 45% 8.7