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#include <iostream>
#include <fstream>
using namespace std;
#define MAX 100001
ifstream f("scmax.in");
ofstream g ("scmax.out");
int a[MAX], best[MAX], poz[MAX];
int n,m,first;
void citire()
{
int i;
f>>n;
for(i=1;i<=n;i++)
f>>a[i];
}
void subsir()
{
int i,j;
for(i=n;i>=1;i--)
{ best[i]=1;poz[i]=0;
for(j=i+1;j<=n;j++)
if(a[i]<a[j] && best[i]<1+best[j])
{
best[i]=1+best[j];
poz[i]=j;
}
if(m<best[i])
{
m=best[i];
first=i;
}
}
}
void tipar()
{
int i;
g<<m<<endl;
for(i=first;i>0;i=poz[i])
g<<a[i]<<' ';
}
int main()
{
citire();
subsir();
tipar();
return 0;
}