#include <iostream>
#include <cstdio>

using namespace std;
int a[100000], l[100000],n,lm;
void cautare_lungimi()
{
    for(int i=n-1;i>=0;i--)
    {
        int m=0;
        for(int j=i+1;j<n;j++)
            if(a[j]>a[i])
                m=max(m, l[j]);
        l[i]=1+m;
        lm=max(l[i],lm);
    }
}
void afisare()
{
    for(int i=0;i<n;i++)
    {
        if(l[i]==lm)
            printf("%d ", a[i]), lm--;
    }
}
int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d\n", &n);
    for(int i=0;i<n-1;i++)
    {
        scanf("%d ", &a[i]);
    }
    scanf("%d/n", &a[n-1]);
    cautare_lungimi();
    printf("%d\n", lm);
    afisare();
    return 0;
}