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

ifstream f("scmax.in");
ofstream g("scmax.out");

int n,i,j,lmax,poz,m,pm;
int v[100001],l[100001],p[100001];

int main()
{
    f>>n;
    for(i=1;i<=n;i++) f>>v[i];

    l[n]=1;
    p[n]=-1;
    for(i=n-1;i>=1;i--)
    {
        lmax=0;
        poz=-1;
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j]) if(lmax<l[j]) {lmax=l[j];poz=j;}
        p[i]=poz;
        l[i]=1+lmax;
        if(l[i]>m) {m=l[i];pm=i;}
    }

    g<<m<<"\n";

    while(pm!=-1)
    {
        g<<v[pm]<<" ";
        pm=p[pm];
    }
    g<<"\n";

    f.close();
    g.close();
    return 0;
}