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#include<fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[100001];
int i,vmax,b[100001],c[100001],p,j,n;
int main()
{
fin>>n;
for(i=1;i<=n;i++)
{
fin>>a[i];
}
for(i=n;i>=1;i--)
{
vmax=0;
p=0;
for(j=i+1;j<=n;j++)
{
if(a[i]<a[j]&&b[j]>vmax)
{
vmax=b[j];
p=j;
}
}
b[i]=1+vmax;
c[i]=p;
}
vmax=b[1];
p=1;
for(i=2;i<=n;i++)
{
if(b[i]>vmax)
{
vmax=b[i];
p=i;
}
}
fout<<vmax<<"\n";
for(i=p;i!=0;i=c[i])
{
fout<<a[i]<<" ";
}
fin.close();
fout.close();
return 0;
}