#include <cstdio>

using namespace std;
int v[10005],subsir[10005],n;
void afisare(int lmax,int poz)
{
    if(lmax==0)
        return;
    int i=poz,j=poz-1;
    while(j==1||subsir[j]!=lmax-1||v[j]>=v[i])
    {
        j--;
    }
    afisare(lmax-1,j);
    printf("%d ",v[i]);

}
int main()
{
    freopen("scmax.in","r",stdin);
    int i,j,lmax=1,poz,nr=1;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        scanf("%d",&v[i]);
    for(i=1;i<=n;i++)
        subsir[i]=1;
    subsir[0]=0;
    for(i=1;i<=n;i++)
    {
        for(j=i-1;j>0;j--)
        {
            if(v[i]>v[j]&&subsir[i]<subsir[j]+1)
            {
                subsir[i]=subsir[j]+1;
            }
        }
    }
    for(i=2;i<=n;i++)
    {
        if(lmax<subsir[i])
        {
            lmax=subsir[i];
            nr=i;
        }
    }
    printf("%d\n",lmax);
    afisare(lmax,nr);
    return 0;
}