#include<fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int i,j,n,a[100001],best[100001],poz,maxim,p,pre[100001];
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>a[i];
    best[n]=1;
    pre[n]=-1;
    for(i=n-1;i>=1;i--)
    {
        best[i]=1;
        pre[i]=-1;
        for(j=i+1;j<=n;j++)
        if(a[i]<a[j] && best[i]<best[j]+1)
        {
            best[i]=best[j]+1;
            pre[i]=j;
            if(best[i]>maxim)
            {
                maxim=best[i];
                p=i;
            }

         }
    }
    fout<<maxim<<'\n';
    i=p;
    while(i!=-1)
    {
        fout<<a[i]<<' ';
        i=pre[i];
    }
    return 0;
}