#include <fstream>
using namespace std;
ofstream fout("scmax.out");
int n,v[100001],maxi[100001],i,pre[100001],j,maxi1,pozmax;
void afis(int i)
{
    if(i!=-1)
    {
        fout<<v[i]<<" ";
        afis(pre[i]);
    }
}
int main()
{
    FILE*fin;
    fin=fopen("scmax.in","r");
    fscanf(fin,"%d",&n);
    for(i=1;i<=n;i++)
    {
        fscanf(fin,"%d",&v[i]);
     //   maxi[i]=1;
    }
    maxi[n]=1;
    pre[n]=-1;
    for(i=n-1;i>=1;--i)
    {
        maxi[i]=1;
        pre[i]=-1;
        for(j=i+1;j<=n;++j)
        {
            if(v[i]<v[j]&&maxi[i]<maxi[j]+1)
            {
                maxi[i]=maxi[j]+1;
                pre[i]=j;
                if(maxi1<maxi[i])
                {
                    maxi1=maxi[i];
                    pozmax=i;
                }
            }
        }
    }
    fout<<maxi1<<'\n';
    i=pozmax;
    afis(i);
    return 0;
}