#include <iostream>
#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
long long sir[1000],a;
long long n, i, j, x[1000], l[1000], ant[1000], maxx, lmax, pmax;
int main()
{
    f>>n;
    for (i=1;i<=n;++i)
        f>>x[i];
    for(i=1;i<=n;++i)
    {   lmax=0;
        ant[i]=0;
        for(j=1;j<=i-1;++j)
            if(x[i]>x[j] && l[j]>lmax)
            {   lmax=l[j];
                ant[i]=j;
            }
        l[i]=lmax+1;
        if(maxx<l[i])
        {   maxx=l[i];
            pmax=i;
        }
    }
    g<<maxx<<'\n';
    for(i=pmax;i>=1;i=ant[i])
        {   a++;
            sir[a]=x[i];
        }
    for(i=a;i>=1;i--)
        g<<sir[i]<<" ";
    return 0;
}