#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[10000],lung[10000],mx,i,j,poz,n;
int main()
{
    fin>>n;
    for(i=0;i<n;++i)fin>>a[i];
    lung[n-1]=1;
    for(i=n-2;i>=0;--i)
    {
        mx=0;
        for(j=i+1;j<=n-1;++j)

            if(a[i]<a[j]) if(mx<lung[j])mx=lung[j];
        lung[i]=mx+1;
    }
    mx=lung[0];
    poz=0;
    for(i=1;i<=n-1;++i)
    {
        if(mx<lung[i]){mx=lung[i];poz=i;}
    }
    fout<<mx<<endl;
    fout<<a[poz]<<" ";
    for(i=poz+1;i<=n-1;i++)
    {
        if(lung[i]==mx-1&&a[i]>a[poz]){fout<<a[i]<<" ";poz=i;mx=mx-1;}
    }
    return 0;
}