#include <iostream>
#include <fstream>
#define DN 100001
#define MAX 2000000001

using namespace std;

ifstream f("scmax.in");
ofstream g("scmax.out");

int n, poz[DN], k, m, b[DN];
long long a[DN];

int caut_bin( int p, int u, int x )
{
    int m;
    while(p<=u)
    {
        m=p+(u-p)/2;
        if(x<a[b[m]])
            p=m+1;
        else u=m-1;
    }
    return p;
}
int main()
{
    f>>n;
    for(int i=1; i<=n; i++)
        f>>a[i];
    a[0]=MAX;
    for(int i=n; i>=0; i--)
    {
        poz[i]=0;
        k=caut_bin(1, m, a[i]);
        if(k>m)
        {
            poz[i]=b[k-1];
            m=k;
            b[k]=i;
        }
        else
        {
            poz[i]=b[k-1];
            if(a[b[k]]<a[i])
                b[k]=i;
        }
    }
    g<<m<<'\n';
    for(int i=b[m]; i>0; i=poz[i])
        g<<a[i]<<" ";
    return 0;
}