Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name Total Acc. Ratio Fastest Total Acc. Ratio Difficulty  
Take Two Stones 9574 6220 65% 0.00 5078 4886 96% 1.2
Crazy Driver 541 217 40% 0.00 175 150 86% 3.8
Boxes 957 344 36% 0.19 222 187 84% 4.0
Dim Sum 55 29 53% 0.05 25 22 88% 5.9
Curious Cupid 1063 165 16% 0.15 135 90 67% 6.5
Classrooms 636 172 27% 0.10 152 107 70% 6.7
0-1 Sequences 2704 452 17% 0.01 591 330 56% 6.8
Let's Meet 452 76 17% 0.01 63 42 67% 7.3
k-Colouring of a Graph 120 29 24% 0.05 21 16 76% 7.7
A+B Problem 2836 272 10% 0.06 448 153 34% 8.4
Palindromes 170 41 24% 0.15 48 23 48% 8.8