#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
const int nmax=100005;
int a[nmax],tatic[nmax],n;
void afisare(int n)
{
    if (tatic[n]) afisare(tatic[n]);
    fout << a[n] << " ";
}
int main()
{
    int dp[nmax],rez=0,cap=0;
    fin >> n;
    for (int i=1;i<=n;i++)
    {
        fin >> a[i];
        dp[i]=1;
    }
    for (int i=2;i<=n;i++)
    {
        for (int j=1;j<=i;j++)
        {
            if (a[i]>a[j])
            {
                if (dp[j]+1>dp[i])
                {
                    dp[i]=dp[j]+1;
                    tatic[i]=j;
                }
            }
        }
    }
    for (int i=1;i<=n;i++)
    {
        if (dp[i]>rez)
        {
            rez=dp[i];
            cap=i;
        }
    }
    fout << rez << '\n';
    afisare(cap);
}