#include <bits/stdc++.h>
using namespace std;

struct iofast_t {
    iofast_t() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr); cout.tie(nullptr);
    }
} iofast;

struct uns_t {} uns;
template <typename Element, typename Head, typename ...Args>
auto vec(Element init, Head arg, Args ...args) {
    if constexpr (sizeof...(Args) == 0) return std::vector(arg, init);
    else return std::vector(arg, vec(init, args...));
}
template <typename Element, typename Head, typename ...Args>
auto vec(uns_t, Head arg, Args ...args) {
    return vec(Element(), arg, args...);
}

template <typename T, typename Compare = less<T>>
T &chmin(T &l, T r, Compare &&f = less<T>()) { return l = min(l, r, f); }
template <typename T, typename Compare = less<T>>
T &chmax(T &l, T r, Compare &&f = less<T>()) { return l = max(l, r, f); }

int main() {
    int n; cin >> n;
    auto a = vec<int>(uns, n);
    for (auto &e : a) cin >> e;

    auto b = a;
    sort(begin(b), end(b));

    if (a == b) {
        cout << 0 << endl;
        return 0;
    }

    int eq = 0;
    reverse(begin(a), end(a));
    reverse(begin(b), end(b));
    for (int i = 0; i < n && a[i] == b[i]; ++i) {
        ++eq;
    }
    reverse(begin(a), end(a));
    reverse(begin(b), end(b));

    {
        auto v = vec<int>(uns, 0);
        for (int i = 0; i < n - eq; ++i) {
            v.push_back(a[i]);
        }
        for (int i = 0; i < n - eq; ++i) {
            v.push_back(a[i]);
        }
        a = v;
    }

    int ans = 0, count = 0, p = 0;
    for (auto e : a) {
        if (e < p) {
            ans = max(ans, count);
            count = 0;
            p = 0;
        }
        count += p <= e;
        p = e;
    }
    ans = max(ans, count);

    if (n - eq <= ans) {
        cout << 1 << endl;
        return 0;
    }

    cout << 2 << endl;
}