#include <cstdio>
using namespace std;
const int NMAX=100005;
int v[NMAX],l[NMAX],urm[NMAX];
int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    int n,i,lis,poz,j;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        scanf("%d",&v[i]);
    l[n]=1;
    urm[n]=0;
    for(i=n-1;i>=1;i--)
    {
        l[i]=1;
        for(j=i+1;j<=n;j++)
        {
            if(v[i]<v[j])
            {
                if(l[j]+1>l[i])
                {
                    l[i]=l[j]+1;
                    urm[i]=j;
                }
            }
        }
    }
    lis=l[1];
    poz=1;
    for(i=2;i<=n;i++)
    {
        if(l[i]>lis)
        {
            lis=l[i];
            poz=i;
        }
    }
    printf("%d\n",lis);
    while(poz!=0)
    {
        printf("%d ",v[poz]);
        poz=urm[poz];
    }
    return 0;
}