#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");


int main()
{
    int n, a[100],i, j,lung[100],poz[100];
    fin>>n;
    for(i=1; i<=n; i++)
        fin>>a[i];
    lung[n]=1;
    poz[n]=-1;
    for(i=n-1; i>0; i--)
    {
        lung[i]=1;
        poz[i]=-1;
        for(j=n; j>i; i--)
            if (a[i]<a[j]&&lung[i]<lung[j]+1)
            {
                lung[i]=lung[j]+1;
                poz[i]=j;
            }
    }
    int maxi=lung[1];
    for(i=1;i<=n;i++)
        if(maxi<lung[i]) maxi=lung[i];

    fout<<maxi<<endl;
    for(i=1;i<=n;i++)
    if(lung[i]==maxi) {fout<<a[i]<<" "; maxi--;}
        return 0;
}