/// scmax / infoarena

#include <fstream>
#define NMAX 100002

using namespace std;

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

int n;
int a[NMAX];
int lgmax[NMAX];
int urm[NMAX];


int main()
{
    int i, j, maxim, pozmax;
    /// citire

    fin >> n;
    for(i = 1; i <= n; i++) fin >> a[i];

    /// initializare
    lgmax[n] = 1, urm[n] = 0;

    for(i = n - 1; i > 0; i--)
    {
        lgmax[i] = 1; urm[i] = 0;
        for(j = i + 1; j <= n; j++)
            if(a[i] < a[j] && lgmax[i] < 1 + lgmax[j])
            {
                lgmax[i] = 1 + lgmax[j];
                urm[i] = j;
            }
    }

    /// lungimea maxima

    maxim = lgmax[1]; pozmax = 1;
    for(i = 2; i <= n; i++)
        if(maxim < lgmax[i]){
            maxim = lgmax[i];
            pozmax = i;
        }

    fout << maxim << '\n';
    /// afisez subsirul cresc de lg max
    i = pozmax;
    while(i)
    {
        fout << a[i] << ' ';
        i = urm[i];
    }

    fout << '\n';
    fout.close();
    return 0;
}