n=int(input())
a=list(map(int,input().split()))
for i in range(n-1):
    if a[i+1]<a[i]:
        flag=1
if not flag:
    print(0)
    exit()
k=min(a)
b=[]
for i in range(n):
    if a[i]==k:
        j=i+1
        b=[a[i]]
        while j<n and a[j]<=a[0]:
            b.append(a[j])
            j+=1
        for k in range(i):
            b.append(a[k])
        for k in range(j,n):
            b.append(a[k])
        break
flag=0
for i in range(n-1):
    if b[i+1]<b[i]:
        flag=1
if not flag:
    print(1)
    exit() 
print(2)