#include <fstream>
#include <climits>
using namespace std;
ifstream f("subsir2.in");
ofstream g("subsir2.out");
int n,i,v[5001],l[5001],maxim,elem,minim,copie,j;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
        f>>v[i];
    l[n]=1;
    for(i=n-1;i>=1;i--)
    {
        l[i]=1;
        for(j=i+1;j<=n;j++)
        if(v[i]<=v[j]){l[i]=l[i]+l[j];break;}
    }

    for(i=1;i<=n;i++)
        if(l[i]>maxim)maxim=l[i];



    g<<maxim<<'\n';

    elem=INT_MIN;
    int poz=0;

    while(maxim)
    {

    minim=INT_MAX;

    for(i=poz+1;i<=n;i++)
    if(l[i]==maxim&&v[i]>=elem&&v[i]<minim){poz=i;minim=v[i];copie=i;}

    g<<copie<<" ";
    elem=v[copie];
    maxim--;


    }


    return 0;
}