N = gets.to_i
A = gets.split.map(&:to_i)
B = A.sort

if A.each_cons(2).count { |a, b| a > b } == 0
  puts 0
  exit
end

i = N - 1
while A[i] == B[i] && i >= 0
  i -= 1
end

C = A[0..i]
D = C.size
cnt = 0

D.times do |j|
  a = C[j]
  b = C[(j + 1) % D]
  cnt += 1 if a > b
end

m = (i == N - 1) ? A.max : A[i + 1..-1].max

if cnt == 1 && C.max <= m
  puts 1
else
  puts 2
end