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#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
struct cell{int e,l,p;};
int j,n,a,b,i,maxi,rep;
cell v[100000];
int main()
{
fin>>n;
for(i=1;i<=n;i++)
{
fin>>v[i].e;
v[i].l=1;
}
maxi=1;
for(i=n;i>0;i--)
{
for(j=i+1;j<=n-maxi+1;j++)
{
if(v[i].e<v[j].e)
{
if(1+v[j].l>v[i].l)
{
v[i].l=1+v[j].l;
v[i].p=j;
if(v[i].l==maxi)
rep++;
if(v[i].l>maxi)
{
maxi=v[i].l;
rep=1;
a=i;
}
}
else
if(1+v[j].l==v[i].l&&v[i].l==maxi)
rep++;
}
}
}
fout<<maxi<<'\n';
for(j=1;j<maxi;j++)
{
fout<<v[a].e<<" ";
a=v[a].p;
}
fout<<v[a].e;
return 0;
}