#include <fstream>
#define NMAX 5007
#define INF 1 << 25
using namespace std;
ifstream f("subsir2.in");
ofstream g("subsir2.out");
int l[NMAX + 1], v[NMAX + 1], s[NMAX + 1];
int n, mi, nr,i,j,k;
int main()
{
    f >> n;
    for(i = 1; i <= n; ++i)
        f >> v[i];
    v[0] = -INF;
    for(i = n; i >= 0; --i)
    {
        mi = l[i] = INF;
        for(j = i + 1; j <= n; ++j)
        {
            if((v[j] < mi) && (v[i] <= v[j]))
            {
                mi = v[j];
                nr = l[j] + 1;
                if ((l[i] == nr) && (v[j] < v[s[i]]))
                    s[i] = j;
                if (nr < l[i])
                {
                    l[i] = nr;
                    s[i] = j;
                }
            }
        }
        if (l[i] == INF)
        {
            l[i] = 1;
            s[i] = i;
        }
    }
    g << l[0] - 1 << "\n";
    k = 0;
    while(k != s[k])
    {
        g << s[k] << " ";
        k = s[k];
    }
    return 0;
}