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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, a[100005], l[100005];
int main()
{
fin>>n;
for(int i=1; i<=n; i++)
{
fin>>a[i];
}
int maax=-1;
for(int i=n; i>0; i--)
{
for(int j=i+1; j<=n; j++)
if(a[i]<a[j])
{
l[i]=max(l[i], l[j]+1);
maax=max(maax, l[i]);
}
}
fout<<maax+1<<"\n";
for(int i=1; i<=n; i++)
{
if(l[i]==maax)
{
fout<<a[i]<< " ";
maax--;
}
}
return 0;
}