#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,k,v[100004],v1[100004],d[100004],maxim,j1,u,t[100004];
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>v[i];
    d[1]=1;
    v[n+1]=1000000004;
    for(int i=2;i<=n+1;i++)
    {
        maxim=0;
        j1=0;
        for(int j=1;j<i;j++)
        {
            if(v[i]>v[j] && d[j]>maxim)
            {
                maxim=d[j];
                j1=j;
            }
        }
        d[i]=maxim+1;
        t[i]=j1;
    }
    fout<<d[n+1]-1<<"\n";
    u=t[n+1];
    while(u!=0)
    {
        v1[++k]=v[u];
        u=t[u];
    }
    for(int i=k;i>=1;i--)
        fout<<v1[i]<<" ";
    return 0;
}