#include <iostream>
#include <cstdio>
#define lim 100005
using namespace std;

int n,v[lim],best[lim],L[lim],p[lim],nr=1,maxim,retin;

int caut(int x)
{
    int st=0,dr=nr;
    int mij=(st+dr)/2;
    while (st<=dr)
    {
        if ( v[L[mij]] < x && v[L[mij+1]] >= x)
            return mij;
        if (v[L[mij]] < x)
            st=mij+1;
        else dr=mij-1;
        mij=(st+dr)/2;
    }
    return nr;
}
void afis(int ind)
{
    if (ind)
        {
            afis(p[ind]);
            printf("%d ",v[ind]);
        }
}
int main()
{
    freopen("scmax.in","r",stdin);
    //freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for (int i=1;i<=n;++i)
        scanf("%d",&v[i]);
    best[0]=0;best[1]=1;L[1]=1;p[1]=0;
    ///best 1=1(lungime maxima), L->vectorul de indici

    for (int i=2;i<=n;++i)
    {
        int loc=caut(v[i]);
        if (loc == nr)
            ++nr;
        L[++loc]=i;
        best[i]=loc; ///maximul pentru el. respectiv e pozitia lui in vector L
        p[i]=L[loc-1]; ///il memorez pe cel de dinainte pentru afisare

        if (best[i] > maxim)
            {
                maxim=loc;
                retin=i;
            }
    }
    printf("%d\n",maxim);
    afis(retin);
    return 0;
}