#include <iostream>
#include <fstream>

using namespace std;

long long x[100001];
int n,lis[100001],poz[100001],maxx,maxs;
int main()
{
    int i,j,p;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>x[i];
    lis[n]=1;
    poz[n]=0;
    for(i=n-1;i>=1;i--)
    {
        poz[i]=0;
        for(j=i+1;j<=n;j++)
        {
            if(x[i]<x[j] && lis[i]<=lis[j])
            {
                poz[i]=j;
                lis[i]=lis[j];
            }
        }
        lis[i]=lis[i]+1;
        if(lis[i]>maxs)
        {
            maxs=lis[i];
            p=i;
        }
    }
    cout<<maxs;
    cout<<"\n";
    while(poz[p]!=0)
    {
        cout<<x[p]<<" ";
        p=poz[p];
    }
    cout<<x[p];
    cout<<"\n";
    return 0;
}