Hack Fulu

The *median* of a sequence is the element in the middle of the sequence after it is sorted. For a sequence with even size, the median is the average of the two middle elements of the sequence after sorting. For example, for a sequence $A = [1, 3, 3, 5, 4, 7, 11]$, the median is equal to $4$, and for $A = [2, 3, 4, 5]$, the median is equal to $(3+4)/2 = 3.5$. Fulu is a famous programmer in his cou