#include <cstdio>
#define N 100005
using namespace std;
int n,i,a[N],sol[N],poz[N],j,maxi,p;
int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        scanf("%d",&a[i]);
    sol[n]=1;
    poz[n]=-1;
    for(i=n-1;i>=1;i--)
    {
        sol[i]=1;
        poz[i]=-1;
        for(j=i+1;j<=n;j++)
            if(a[i]<a[j]&&sol[i]<sol[j]+1)
            {
                sol[i]=sol[j]+1;
                poz[i]=j;
                if(maxi<sol[i])
                {
                    maxi=sol[i];
                    p=i;
                }
            }
    }

    printf("%d\n",maxi);
    while(p!=-1)
    {
        printf("%d ",a[p]);
        p=poz[p];
    }
    return 0;
}