#include <fstream>
#include <algorithm>
#define NMAX 100001

using namespace std;

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

int v[NMAX], x[NMAX], i, j, n, l=-1, tata[NMAX];

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

    x[n]=1;
    for (i=n-1; i>=1; --i)
    {
        x[i]=1;
        for (j=i+1; j<=n; ++j)
        if (v[j]>v[i] && x[i]<=x[j])
        x[i]=x[j]+1, tata[i]=j;

        l=max(l,x[i]);
    }
    g<<l<<'\n';

    for (i=1; i<=n; ++i)
    if (x[i]==l) break;

    while (tata[i]!=0)
    {
        g<<v[i]<<" ";
        i=tata[i];
        if (tata[i]==0) g<<v[i];
    }


    return 0;
}