#include <iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    int a[10005];
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
        a[i]--;
    }
    int c = 0;
    int b[10005]{0};
    for (int i = 0; i < n; i++)
    {
        for (int j = a[i]; j < n; j++)
        {
            c += b[j];
        }
        b[a[i]]++;
    }
    cout << 1 - c % 2 * 2 << endl;
}