#include <stdio.h>

using namespace std;

int main()
{
    int lmax=0,i,n,v[100001],l[100001],j,max;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        scanf("%d",&v[i]);
    l[n]=1;
    for(i=n-1;i>=1;i--)
    {
        max=0;
        for(j=n;j>=i+1;j--)
            if(v[i]<v[j])
                if(l[j]>max)
                    {
                        max=l[j];
                        l[i]=max+1;

                    }
        if(max==0)
            l[i]=1;
        if(max+1>lmax)
            lmax=max+1;
    }
    printf("%d\n",lmax);
    for(i=1;i<=n;i++)
        if(l[i]==lmax)
        {
            printf("%d ",v[i]);
            lmax--;
        }
    return 0;
}