#include <fstream>

using namespace std;
int n,i,j,minim,mini,v[5001],w[5001],s[5001];
bool p[5001];
int main()
{
    ifstream f("subsir2.in");
    ofstream g("subsir2.out");
    f>>n;
    for(i=1; i<=n; i++)
        f>>v[i];
    for(i=n-1; i>=1; i--)
    {
        minim=1000001;
        for(j=i+1; j<=n; j++)
        {
            if(v[i]<=v[j])
            {
                p[j]=1;
                if(v[j]<minim)
                {
                    minim=v[j];
                    if(!s[i]) s[i]=j;
                    else if(w[j]<=w[s[i]]) s[i]=j;
                }
            }
        }
        if(s[i]) w[i]=w[s[i]]+1;
    }
    minim=5001;
    for(i=1; i<=n; i++)
    {
        if(p[i]==0&&(w[i]<minim||(w[i]==minim&&v[i]<v[mini])))
        {
            mini=i;
            minim=w[i];
        }
    }
    g<<w[mini]+1<<"\n"<<mini<<" ";
    while(s[mini])
    {
        mini=s[mini];
        g<<mini<<" ";
    }
    f.close(); g.close();
    return 0;
}