#include<cstdio>
#define NMAX 100005
using namespace std;
unsigned int v[NMAX], l[NMAX];
int n;

int main()
{
    freopen("scmax.in","r", stdin);
    freopen("scmax.out", "w", stdout);

    scanf("%d", &n);

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

    int maxim = 0;
    l[n] = 1;
    for(int k = n - 1; k >= 1; --k)
    {
        maxim = 0;
        for(int i = k + 1; i <= n; ++i)
            if(v[i] > v[k] && l[i] > maxim)
            {
                 maxim = l[i];
                 l[k] = maxim + 1;
            }
    }
    maxim = l[1];
    int poz_max = 1;
    for(int i = 1; i <= n; ++i) if(l[i] > maxim) maxim = l[i], poz_max = i;
    printf("%d\n", maxim);
    printf("%d ", v[poz_max]);
    for(int i = poz_max + 1; i <= n; ++i)
    {
        if(v[poz_max] < v[i] && l[i] == maxim - 1)
            printf("%d ", v[i]), maxim-= 1;
    }
    return 0;
}