#include <cstdio>
#define NMAX 100005

using namespace std;

long int a[NMAX], n, b[NMAX];

void citire()
{
    scanf("%d", &n);
    for(int i=0;i<n;i++)
        scanf("%d ", &a[i]);
}

int maxim(int i)
{
    int maxi=a[i], nrmax=0;
    for(int j=n-1;j>i;j--)
        if(maxi<a[j])
             nrmax=j;
    return b[nrmax];
}

void generare()
{
    int lmax=0, poz[NMAX], nr=0;
    for(int i=n-1;i>=0;i--)
    {
        b[i]=maxim(i)+1;
        if(lmax<b[i])
        {
            lmax=b[i];
            poz[nr++]=a[i];
        }
    }
    printf("%d\n", lmax);

    for(int i=nr-1;i>=0;i--)
        printf("%d ", poz[i]);
}

int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);

    citire();
    generare();
    return 0;
}