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#include<fstream>
using namespace std;
ifstream fin("smax.in");
ofstream fout("smax.out");
int N,a[100009],i,Lmax,p,j,b[100009],c[100009];
int main()
{
fin>>N;
for(i=1;i<=N;i++)
{
fin>>a[i];
}
for(i=N;i>=1;i--)
{
Lmax=0;
p=0;
for(j=i+1;j<=N;j++)
{
if(a[i]<a[j] && b[j]>Lmax)
{
Lmax=b[j];
p=j;
}
}
b[i]=1+Lmax;
c[i]=p;
}
Lmax=b[1];
p=1;
for(i=2;i<=N;i++)
{
if(b[i]>Lmax)
{
Lmax=b[i];
p=i;
}
}
fout<<Lmax<<'\n';
for(i=p;i!=0;i=c[i])
{
fout<<a[i]<<" ";
}
fin.close();
fout.close();
return 0;
}