#include <bits/stdc++.h>

using namespace std;
ifstream fin ("scmax.in");
ofstream fout ("scmax.out");
int n,v[100005],d[100005],i,j,pre[100005],lmax,pmax;
void afis (int i)
{
    //cout<<v[i]<<" ";
    if (pre[i]>0) afis (pre[i]);
    fout<<v[i]<<" ";
}
int main()
{
    fin>>n;
    for (i=1;i<=n;i++) d[i]=1;
    for (i=1;i<=n;i++) fin>>v[i];
    for (i=1;i<=n;i++)
        {
            for (j=i-1;j>0;j--)
                if (v[i]>v[j] && d[i]<d[j]+1)
                    {
                        d[i]=d[j]+1;
                        pre[i]=j;
                    }
            if (d[i]>=lmax)
                {
                    lmax=d[i];
                    pmax=i;
                }
        }
    fout<<lmax<<'\n';
    afis (pmax);
    return 0;
}