#include <fstream>
#include <conio.h>

using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int main()
{long a[100001],b[100001],pre[100001],p,i,j,n,max,f[100000];
fin>>n;
for(i=1;i<=n;i++)
     fin>>a[i];

b[1]=1;
pre[1]=0;
for(i=2;i<=n;i++)
    {max=0;
    pre[i]=0;
    for(j=1;j<i;j++)
          if(a[i]>a[j]&&b[j]>max){max=b[j];pre[i]=j;}
    b[i]=max+1;
    }
max=0;
for(i=1;i<=n;i++)
    if(b[i]>max){max=b[i];p=i;}
fout<<max<<endl;
n=max;
f[n--]=a[p];
while(pre[p]!=0)
      {
       p=pre[p];
       f[n--]=a[p];

      }
for(i=1;i<=max;i++)
   fout<<f[i]<<" ";
return(0);
}