Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
0-1 Sequences 11267 1781 16% 0.00 2319 1227 53% 6.0
A+B Problem 9470 935 10% 0.03 1365 451 33% 8.3
Boxes 1760 697 40% 0.06 472 394 83% 4.1
Classrooms 3537 666 19% 0.05 485 343 71% 6.2
Crazy Driver 858 329 38% 0.00 275 233 85% 4.0
Curious Cupid 1230 240 20% 0.08 196 135 69% 6.1
Dim Sum 97 39 40% 0.04 45 31 69% 7.4
k-Colouring of a Graph 215 54 25% 0.03 41 29 71% 8.6
Let's Meet 718 137 19% 0.00 101 63 62% 8.4
Palindromes 505 88 17% 0.09 132 43 33% 8.7
Take Two Stones 41824 25129 60% 0.00 21142 20322 96% 1.3