#include <fstream>
#include <algorithm>

using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

int v[100001],l[100001],val_min[100001];

void refac_subsir(int p, int val, int lung)
{
    if (lung == 1)
    {
        return;
    }
    if (v[p] < val && l[p] == lung - 1)
    {
        refac_subsir(p - 1, v[p], l[p]);
        fout << v[p] << " ";
    }
    else
    {
        refac_subsir(p - 1, val, lung);
    }
}


int cautbin(int x[],int n, int val)
{
    int st=1,dr=n,rez=0;
    while(st<=dr)
    {
        int mij=(st+dr)/2;
        if(x[mij]<val)
        {
            st=mij+1;
            rez=mij;
        }
        else
            dr=mij-1;
    }
    return rez;
}

int main()
{
    int n,minn=0,pmax=1;
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>v[i];
    for(int i=1;i<=n;i++)
    {
        int j=cautbin(val_min,minn,v[i]);
        if(j==minn)
            minn++;
        l[i]=j+1;
        val_min[l[i]]=v[i];
        if(l[i]>l[pmax])
            pmax=i;
    }
    fout<<l[pmax]<<'\n';
    refac_subsir(pmax,v[pmax]+1,l[pmax]+1);
    return 0;
}