#include<bits/stdc++.h>
using namespace std;
ifstream fin("subsir2.in");
ofstream fout("subsir2.out");

int s[5001],v[5001],j,succ[5001],i,n,minm,mini;
bool pred[5001];

int main()
{
    fin >> n;
    for(int i=1;i<=n;i++)
        fin>>v[i];

    for(int i=n-1;i>=1;i--)
    {
        minm=1000001;
        for(j=i+1;j<=n;j++)
        {
            if (v[i]<=v[j])
            {
                pred[j]=1;
                if(v[j]<minm)
                {
                    minm=v[j];
                    if (!s[i]) s[i]=j;
                    else if (succ[j]<=succ[s[i]]) s[i]=j;
                }
            }
        }
        if (s[i]) succ[i]=succ[s[i]]+1;
    }
    minm=5001;
    for (i=1;i<=n;i++)
    {
        if (pred[i]==0) if (succ[i]<minm || (succ[i]==minm && v[i]<v[mini])) {mini=i; minm=succ[i];}
    }
    fout<<succ[mini]+1<<"\n"<<mini<<" ";
    while (s[mini])
    {
        mini=s[mini];
        fout<<mini<<" ";
    }
}