#include <cstdio>
#define MAX 100100
using namespace std;
int x[MAX],l[MAX],next[MAX];
int main()
{
    int n,i,j,lmax,poz;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;++i)scanf("%d",x+i);
    l[n]=1;next[n]=0;
    for(i=n-1;i>=1;--i)
    {
        l[i]=0;next[i]=0;
        for(j=i+1;j<=n;++j)
            if(x[i]<x[j])
                if(l[j]+1>l[i])
                {
                    l[i]=l[j]+1;
                    next[i]=j;
                }
    }
    lmax=l[1];poz=1;
    for(i=2;i<=n;++i)
        if(l[i]>lmax)
        {
            lmax=l[i];
            poz=i;
        }
    printf("%d\n",lmax);
    while(poz>0)
    {
        printf("%d ",x[poz]);
        poz=next[poz];
    }
    return 0;
}