#include <fstream>

using namespace std;

int n,m,a[1001],v[1001],i,j,p,maxi;

ifstream cin("scmax.in");
ofstream cout("scmax.out");

int main()
{
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>v[i];
    a[n]=1;
    for(i=n-1;i>=1;i--)
    {
        maxi=0;
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j]&&a[j]>maxi)
            maxi=a[j];
        a[i]=maxi+1;
    }
    maxi=0;
    for(i=1;i<=n;i++)
        if(a[i]>maxi)
    {
        maxi=a[i];
        p=i;
    }
    cout<<maxi<<endl;
    cout<<v[p]<<" ";
    maxi--;
    for(i=p+1;i<=n;i++)
        if(a[i]==maxi&&v[i]>v[p])
    {
        cout<<v[i]<<" ";
        maxi--;
        p=i;
    }
    return 0;
}