#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<<" ";
    }
   return 0;
}