#include <stdio.h>

using namespace std;

int x[102],y[102],z[102],u[102],v;

int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    int n,max=y[1],k;
    scanf("%d",&n);
    for(int i=1;i<=n;++i)
        scanf("%d",&x[i]);
    for(int i=1;i<=n;++i)
    {
        y[i]=1;
        for(int j=1;j<i;++j)
            if(x[i]>x[j])
                if(y[i]<y[j]+1)
                {
                    y[i]=y[j]+1;
                    z[i]=j;
                }
    }
    for(int i=1;i<=n;++i)
        if(y[i]>max)
        {
            max=y[i];
            k=i;
        }
    printf("%d\n",max);
    do
    {
        ++v;
        u[v]=x[k];
        k=z[k];
    }while(k!=0);
    for(int i=v;i>=1;--i)
        printf("%d ",u[i]);
    return 0;
}