Problems from Hong Kong Regional Online Preliminary 2016

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
0-1 Sequences 12920 2066 16% 0.00 2695 1445 54% 5.4
A+B Problem 10554 1017 10% 0.03 1481 485 33% 8.5
Boxes 1917 770 40% 0.06 513 426 83% 4.1
Classrooms 4197 789 19% 0.05 568 402 71% 6.4
Crazy Driver 896 345 39% 0.00 291 247 85% 4.0
Curious Cupid 1319 265 20% 0.08 200 137 68% 6.3
Dim Sum 105 39 37% 0.04 48 31 65% 7.9
k-Colouring of a Graph 219 54 25% 0.03 42 29 69% 9.0
Let's Meet 757 144 19% 0.00 105 66 63% 8.5
Palindromes 538 101 19% 0.09 140 50 36% 8.5
Take Two Stones 48813 29129 60% 0.00 24614 23646 96% 1.2