#include<cstdio>
using namespace std;
int n,a[100001],L[100001],poz[100001],p,maxi;
int main()
{int i,j;
freopen("scmax.in","r",stdin);
freopen("scmax.out","w",stdout);
scanf("%d",&n);
for (i=1;i<=n;++i)
    scanf("%d",&a[i]);
L[n]=1; poz[i]=-1; p=n;
for (i=n-1;i>0;--i)
    {L[i]=1; poz[i]=-1;
    for (j=i+1;j<=n;++j)
        {if (a[i]<a[j] && L[i]<L[j]+1)
            {L[i]=L[j]+1; poz[i]=j;
            if (L[i]>maxi) {maxi=L[i]; p=i;}
            }
        }
    }
printf("%d\n",maxi);
for (i=1;i<=maxi;++i)
    {printf("%d ",a[p]);
    p=poz[p];
    }
printf("\n");
return 0;
}