Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
0-1 Sequences 2885 490 17% 0.01 625 347 56% 6.8
A+B Problem 3067 315 10% 0.04 466 162 35% 8.3
Boxes 969 348 36% 0.15 230 190 83% 4.3
Classrooms 711 186 26% 0.08 155 110 71% 6.4
Crazy Driver 542 219 40% 0.00 176 151 86% 3.8
Curious Cupid 1063 164 15% 0.08 135 89 66% 6.9
Dim Sum 55 29 53% 0.04 25 22 88% 6.7
k-Colouring of a Graph 120 31 26% 0.03 21 16 76% 7.8
Let's Meet 452 74 16% 0.01 63 40 63% 8.3
Palindromes 194 43 22% 0.13 52 25 48% 8.7
Take Two Stones 10765 6921 64% 0.00 5645 5434 96% 1.2