#include <cstdio>
using namespace std;

int a[100005],l[100005],poz[100005],n,max,maxi;

int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for (int i=0;i<n;i++)
        scanf("%d",&a[i]);
    for (int i=n-1;i>=0;i--)
    {
        max=0;
        for (int j=i+1;j<=n-1;j++)
        {
            if (a[j]>a[i])
                if (max<l[j])
                {
                    max=l[j];
                    poz[i]=j;
                }
        }
        l[i]=1+max;
        if (max==0)
            poz[i]=-1;
        max=0;
    }
    max=0;

    for (int i=0;i<n;i++)
        if (max<l[i])
        {
            max=l[i];
            maxi=i;
        }
    printf("%d\n",max);
    printf("%d ",a[maxi]);
    for (int i=0;i<max-1;i++)
    {
        printf("%d ",a[poz[maxi]]);
        maxi=poz[maxi];
    }
    return 0;
}