#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int v[100001], l[100001], urm[100001], n, maxi, p;
void citire()
{
    int i;
    f>>n;
    for(i=1;i<=n;i++)f>>v[i];
}
void scmax()
{
    int i, j;
    l[n]=1;
    urm[n]=0;
    for(i=n-1;i>=1;i--)
    {
        maxi=0;
        p=0;
        for(j=i+1;j<=n;j++)
        {
            if(v[j]>v[i])
            {
                if(l[j]>maxi)
                {
                    maxi=l[j];
                    p=j;
                }
            }
        }
        l[i]=maxi+1;
        urm[i]=p;
    }
    maxi=0;
    for(i=1;i<=n;i++)
    if(l[i]>maxi)
    {
        maxi=l[i];
        p=i;
    }
    g<<maxi<<'\n';
    while(p)
    {
        g<<v[p]<<" ";
        p=urm[p];
    }
}
int main()
{
    citire();
    scmax();
    f.close();
    g.close();
    return 0;
}