#include <cstdio>

FILE *fin = freopen("scmax.in","r",stdin); FILE *fout = freopen("scmax.out","w",stdout);

static const int MAX_N = 100000 + 5;

/* ------------- DATA ------------- */
int n;
int best[MAX_N], v[MAX_N], poz[MAX_N], maxi,p;
/* ------------- DATA ------------- */

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

void Dinamica()
{
    maxi = 1;
    best[n]=1;
    poz[n] = -1;
    p = n;

    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] > maxi)
                    maxi = best[i], p = i;
            }
        }
    }
    printf("%d\n",maxi);
}

void Reconstruieste()
{
    int i = p;
    while(i!=-1)
    {
        printf("%d ",v[i]);
        i = poz[i];
    }
}

int main()
{
   Read();
   Dinamica();
   Reconstruieste();
}