#include <fstream>

using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int n,i,a[100001],b[100001],poz[100001],mx,p,j;
int main()
{
    cin>>n;
    for(i=1; i<=n; i++) cin>>a[i];
    b[n]=1;
    poz[n]=-1;
    mx=1;
    p=n;
    for(i=n-1; i>=1; --i)
    {
        b[i]=1;
        poz[i]=-1;
        for(j=i+1; j<=n; ++j)
            if(a[i]<a[j] && b[i]<b[j]+1)
            {
                b[i]=b[j]+1;
                poz[i]=j;
                if(b[i]>mx) mx=b[i],p=i;
            }
    }
    cout<<mx<<'\n';
    i=p;
    while(i!=-1)
    {
        cout<<a[i]<<' ';
        i=poz[i];
    }
    return 0;
}