Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name Total   Acc. Ratio Fastest Total Acc. Ratio Difficulty
Dim Sum 55 29 53% 0.05 25 22 88% 5.9
k-Colouring of a Graph 120 29 24% 0.05 21 16 76% 7.8
Palindromes 170 41 24% 0.15 48 23 48% 8.8
Let's Meet 452 76 17% 0.01 63 42 67% 7.3
Crazy Driver 541 217 40% 0.00 175 150 86% 3.8
Classrooms 636 172 27% 0.10 152 107 70% 6.7
Boxes 957 344 36% 0.19 222 187 84% 4.0
Curious Cupid 1063 165 16% 0.15 135 90 67% 6.5
0-1 Sequences 2705 452 17% 0.01 592 330 56% 6.9
A+B Problem 2836 272 10% 0.06 448 153 34% 8.4
Take Two Stones 9640 6253 65% 0.00 5102 4909 96% 1.2