#include <cstdio>
using namespace std;
#define nmax 100003
long long n,v[nmax],lg[nmax],pz[nmax],maxa=-1,poz;;
void Read()
{
    scanf("%llu",&n);
    for(int i=1; i<=n; i++)
          scanf("%llu",&v[i]);
}
void subsir()
{
    lg[n]=1;
    pz[n]=-1;
    for(int i=n-1; i>=1; i--)
    {
        lg[i]=1;
        pz[i]=-1;
        for(int j=i+1; j<=n; j++)
            if(v[i]<v[j] && lg[i]<lg[j]+1)
            {
                lg[i]=lg[j]+1;
                pz[i]=j;
            }
        if(lg[i]>maxa)
        {
            maxa=lg[i];
            poz=i;
        }
    }
    printf("%llu",maxa);
    printf("\n");
    while(poz!=-1)
    {
        printf("%llu ",v[poz]);
        poz=pz[poz];
    }
}
int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    Read();
    subsir();
    return 0;
}