#include<iostream>
#include<fstream>

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

#define nrm 100005
int n,maxlength=1,k=0;
int v[nrm];
int vlength[nrm];
int rez[nrm];

void read()
{
    fin>>n;
    for(int i=1; i<=n; i++)
    {
        fin>>v[i];
    }
}

void scmax()
{
    for(int i=1; i<=n; i++)
    {
        vlength[i]=1;
    }
    int i=2,j=1;
    while(i<=n)
    {
        if(v[i]>v[j])
        {
            if(vlength[i]<vlength[j]+1)
            {
                vlength[i]=vlength[j]+1;
            }
        }
        if(i==j+1)
        {
            i++;
            j=1;
        }
        else
        {
            j++;
        }
    }
    for(int i=1; i<=n; i++)
    {
        if(maxlength<vlength[i])
        {
            maxlength=vlength[i];
        }
    }
}

void afisare()
{
    fout<<maxlength<<'\n';
    for(int i=n;i>=1;i--)
    {
        if(vlength[i]==maxlength)
        {
            maxlength--;
            k++;
            rez[k]=v[i];
        }
    }
    for(int i=k;i>=1;i--)
    {
        fout<<rez[i]<<" ";
    }
}

int main()
{
    read();
    scmax();
    afisare();
    fin.close();
    fout.close();
    return 0;
}