Given category (1-D int), revenue (1-D float) and integer n, return the indices of the top-n revenue rows within each category:

• order by category ascending, then revenue descending
• a category with fewer than n rows contributes all of theirs

Input

category = [0 0 0 1 1]
revenue = [5. 9. 7. 2. 8.]
n = 2

Output

[1 2 4 3]