#include <cstdio>

using namespace std;

int n,v[100003],best[100003],max,poz[100003],loc;

FILE * f1 = fopen("scmax.in","r");
FILE * f2 = fopen("scmax.out","w");

void Read()
{
    fscanf(f1,"%i",&n);
    for(int i=1;i<=n;i++)
        fscanf(f1,"%i",&v[i]);

}

void Subsir()
{
    max = 1;
    best[n] = 1;
    poz[n] = -1;
    for(int i=n-1;i>=1;i--)
    {
        best[i] = 1;
        poz[i] = -1;
        for(int j=i+1;j<=n;j++)
        {
            if(v[i] < v[j] && best[i] < best[j] + 1)
            {
                best[i] = best[j] + 1;
                poz[i] = j;
            }
        }
        if(best[i] > max)
        {
            max = best[i];
            loc = i;
        }
    }
}

int main()
{
    Read();
    Subsir();
    fprintf(f2,"%i\n",max);
    while(loc != -1)
    {
        fprintf(f2,"%i ",v[loc]);
        loc = poz[loc];
    }
    return 0;
}