#include <iostream>
#include <fstream>

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

int n,i,v[100000],l[100000],poz[100000],j;
int main()
{
    fin>>n;
    for(i=1;i<=n;++i)
        fin>>v[i];

    l[n]=0;
    poz[n]=0;

    for(i=n-1;i>=1;i--)
    {
        for(j=n;j>i;--j)
            if(v[i]<v[j] && l[i]<=l[j] )
            {
                l[i]=l[j]+1;
                poz[i]=j;
            }
    }
    int len=0, start;

    for(i=1;i<=n;++i) if(len<l[i]){len=l[i];start=i;}

    fout<<len+1<<endl;

    for(i=0;i<=len;++i)
    {
        fout<<v[start]<<' ';
        start=poz[start];

    }

    return 0;
}