#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[100001],l[100001],n;
int fmax(int i)
{
    int amax=-1;
    for(int k=i;k<=n;k++)
    {
        if(l[k]>amax)
            amax=l[k];
    }
    return amax;
}
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>a[i];
    l[n]=1;
    int j,mx,lm;
    for(int i=n-1;i>=1;i--)
    {
        mx=0;
        for(int j=i+1;j<=n;j++)
            if(l[j]>mx and a[i]<=a[j])
                mx=l[j];
        l[i]=mx+1;
        if(lm<l[i])
            lm=l[i];
    }
    cout<<lm<<endl;
    int t=0,p=1;
    do
    {
        while(l[p]!=lm or a[t]>a[p])
            p++;
        cout<<a[p]<<" ";
        t=p;
        lm--;
    }
    while(lm);
    return 0;
}