#include <iostream>
#include <fstream>
using namespace std;
#define MAX 100005
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[MAX],b[MAX],c[MAX];
int main()
{
    int n;
    fin >> n;
    for(int i = 1; i<=n; i++)
        fin >> a[i];
    for(int i = 1; i<=n; i++)
    {
        for(int j = 1; j<=i-1; j++)
        {
            if(a[j]<a[i])
                b[i] = max(b[i],b[j]);
        }
        b[i]++;
    }
    int mx = -1,j = 1;
    for(int i = 1; i<=n; i++)
        {
            if(b[i]>mx)
            {
                mx = b[i];
                j = i;
            }
        }

    fout << mx << "\n";
    int dr = 0;
    c[++dr] = a[j];
    for(int i = j-1; i>=1; i--)
    {
        if(b[i] == b[j]-1)
           {c[++dr] = a[i]; j = i;}
    }
    for(int i = dr; i>=1; i--)
        fout << c[i] << " ";
    return 0;
}