#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,i,k,ma,j,v[1001],l[1001];
int main()
{f>>n;
for(i=1;i<=n;++i)
f>>v[i];
l[n]=1;
for(i=n-1;i>=1;--i)
{ma=0;
for(j=i+1;j<=n;++j)
if(v[i]<v[j]&&l[j]>ma)
ma=l[j];
l[i]=ma+1;}
ma=0;
for(i=1;i<=n;++i)
{if(l[i]>ma)
{ma=l[i];
k=i;}}
g<<ma<<'\n'<<v[k]<<' ';
--ma;
for(i=k+1;i<=n;++i)
if(v[i]>v[k]&&l[i]==ma)
{g<<v[i]<<' ';
--ma;
k=i;}
return 0;}