#include <iostream>
#include <cstdio>
using namespace std;

#define NMAX 100000

int N,a[NMAX],l[NMAX],lmax;

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

void dp()
{
    l[N-1]=1;
    for(int i=N-2;i>=0;i--)
    {
        int maxim=0;
        for(int j=N-1;j>i;j--)
        {
            if(a[j]>a[i] && l[j]>maxim)
                maxim=l[j];
        }
        l[i]=1+maxim;
        if(l[i]>lmax)
            lmax=l[i];
    }
    printf("%d\n",lmax);
    int i;
    for(i=0;l[i]!=lmax;i++);
    for(;i<N;)
    {
        printf("%d ",a[i]);
        lmax--;
        for(i++;l[i]!=lmax;i++);
    }
}

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

    return 0;
}