#include <stdio.h>
#include <stdlib.h>
#define N 100000

int v[N], l[N], vmin[1+N], n, m;
FILE *in, *out;

int caut_bin(int x)
{
    //caut cel mai mic p cu propr vmin[p] >= x
    if (vmin[m] < x)
    {
        return m + 1;
    }
    int st = 1, dr = m;
    while (st < dr)
    {
        int mij = (st + dr) / 2;
        if (vmin[mij] >= x)
        {
            dr = mij;
        }
        else
        {
            st = mij + 1;
        }
    }
    return st;
}

void subsirul(int poz)
{
    int i = poz - 1;
    while (i >= 0 && l[i] != l[poz] - 1)
    {
        i--;
    }
    if (i >= 0)
    {
        subsirul(i);
    }
    fprintf(out, "%d ", v[poz]);
}

int main()
{
    in = fopen("scmax.in", "r");
    out = fopen("scmax.out", "w");
    fscanf(in, "%d", &n);
    int i, k, pozm;
    for (i = 0; i < n; i++)
    {
        fscanf(in, "%d", &v[i]);
    }
    fclose(in);
    vmin[++m] = v[0];
    l[0] = 1;
    pozm = 0;
    for (i = 1; i < n; i++)
    {
        k = caut_bin(v[i]);
        vmin[k] = v[i];
        l[i] = k;
        if (k > m)
        {
            m++;
            pozm = i;
        }
    }
    fprintf(out, "%d\n", m);
    subsirul(pozm);
    fclose(out);
    return 0;
}