n = gets.to_i
a = gets.strip.split.map &:to_i
def find_swaps(a)
    map = a.each_with_index.map{|x,i| [x,i]}.to_h
    swaps = 0; sort = a.sort
    for i in 0...a.size do
        if sort[i] != a[i]
            swaps += 1
            map[a[i]] = map[sort[i]]
            a[map[sort[i]]], a[i] = a[i], sort[i] end end
    swaps end
puts [find_swaps(Marshal.load(Marshal.dump(a))),find_swaps(a.reverse)].min