#include<iostream>
#include<climits>
#include<fstream>
#define MAX 100001
using namespace std;
fstream fin("scmax.in",ios::in),fout("scmax.out",ios::out);
int l[MAX],p[MAX],x[MAX],n,v[MAX];
int main()
{
    int i,j,max=INT_MIN,maxi=0,k=0,cate=0;
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>x[i];
        l[i]=1;
        for(j=1;j<i;j++)
        {
            if(x[i]>x[j] && l[j]+1>l[i])
            {
                l[i]=l[j]+1;
                p[i]=j;
            }
        }
        if(max<l[i])
        {
            max=l[i];
            maxi=i;
        }
        cout<<p[i]<<" ";
    }
    for(i=maxi;i>=1;i=p[i])
    {
        v[++k]=x[i];
    }
    fout<<k<<'\n';
    for(i=k;i>=1;i--)
    {
        fout<<v[i]<<" ";
    }
    fin.close();
    fout.close();
    return 0;
}