#include <bits/stdc++.h>
#define NMAX 100001
using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

int n,a[NMAX],l[NMAX],urm[NMAX];

int pd()
{
    int i,j,p,maxi;
    l[n]=1; urm[n]=0;
    for(i=n-1;i>=1;i--)
    {
        maxi=0; p=0;
        for(j=i+1;j<=n;j++)
        {
            if(a[i]<a[j]&&l[j]>maxi)
            {
                maxi=l[j]; p=j;
            }
        }
        l[i]=maxi+1;
        urm[i]=p;
    }
    p=1;
    for(i=2;i<=n;i++)
    {
        if(l[i]>l[p]) p=i;
    }
    return p;
}

void afisare(int p)
{
    fout<<l[p]<<"\n";
    while(p!=0)
    {
        fout<<a[p]<<" ";
        p=urm[p];
    }
}

int main()
{
    int i,p;
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>a[i];
    }
    p=pd();
    afisare(p);
    return 0;
}