#include <cstdio>
FILE *f=fopen("scmax.in","r");
FILE *g=fopen("scmax.out","w");


using namespace std;
int n,mx,k,a[100001],i,l[100001];

void solve()
{
    int i,j;
    l[n]=1;
    for (i=n-1;i>=1;i--)
    {
        mx=0;
        for (j=i+1;j<=n;j++)
            if (l[j]>mx && a[i]<a[j])
                mx=l[j];
        l[i]=mx+1;
    }

    mx=0;
    for (i=1;i<=n;i++)
        if (l[i]>mx)
        {
            mx=l[i];
            k=i;
        }
}

void afis()
{
    int i,j;
    fprintf(g,"%d\n",mx);
    for (i=k;i<=n && mx;i++)
        if (l[i]==mx)
        {
            fprintf(g,"%d ",a[i]);
            mx--;
        }
}

int main()
{
    fscanf(f,"%d",&n);
    for (i=1;i<=n;i++)
        fscanf(f,"%d",&a[i]);
    solve();
    afis();
    fclose(f);
    fclose(g);
    return 0;
}