#include <fstream>
#define DIM 100010
using namespace std;
int v[DIM], t[DIM];

int d[DIM];
int n, i, j, maxim, sol, p, u, k;
ifstream fin ("scmax.in");
ofstream fout("scmax.out");
void drum(int u) {
    if (u!=0) {
        drum(t[u]);
        fout<<v[u]<<" ";
    }
}
int main () {
    fin>>n;
    for (i=1;i<=n;i++)
        fin>>v[i];
    d[1] = 1;
    for (i=2;i<=n;i++) {
        maxim = 0;
        for (j=1;j<i;j++)
            if (v[j] < v[i] && d[j] > maxim) {
                maxim = d[j];
                p = j;
            }
            d[i] = maxim + 1;
        if (d[i] != 1)
            t[i] = p;
        else
            t[i] = 0;
        if (d[i] > sol) {
            sol = d[i];
            u = i;
        }
    }
    fout<<sol<<"\n";
    drum(u);
    return 0;
}