#include <iostream>
#include <fstream>

using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int i,n,j,p,poz[100001],a[100001],best[100001],Max;

int main()
{
    fin >>n;
    for (i=1;i<=n;i++)
        fin>>a[i];
    best[n]=1;
    poz[n]=-1;
    p=n;
    Max=1;
    for (i=n-1;i>=1;i--)
    {
        best[i]=1;
        poz[i]=-1;
        for (j=i+1;j<=n;j++)
        {
            if (a[i]<a[j]&&best[i]<best[j]+1)
            {
                best[i]=best[j]+1;
                poz[i]=j;
                p=i;
                if (Max<best[i])
                    Max=best[i];
            }
        }
    }
    i=p;
    fout<<Max<<'\n';
    while(i!=-1)
    {
        fout<<a[i]<<" ";
        i=poz[i];
    }



    return 0;
}