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#include <iostream>
#include <fstream>
using namespace std;
int L[100003],p[100003],x[100003],k,n,MAX=-1;
ifstream f("scmax.in");
ofstream g("scmax.out");
void p_dinamic()
{
int i,j;
L[n]=1;
p[n]=n;
for(i=n-1;i>=1;i--)
{
L[i]=1;
p[i]=-1;
for(j=i+1;j<=n;j++)
if(x[i]<x[j]&&L[i]<L[j]+1)
{
L[i]=L[j]+1;
p[i]=j;
if(MAX<L[i])
{
MAX=L[i];
k=i;
}
}
}
}
void solutie()
{
for(int i=1;i<=n;i++)
{
if(MAX<L[i])
{
MAX=L[i];
k=i;
}
}
}
void afisare()
{int i,j;
j=k;
for(i=1;i<=L[k];i++)
{
g<<x[j]<<" ";
j=p[j];
}
}
int main(){
f>>n;
int i;
for(i=1;i<=n;i++)
f>>x[i];
p_dinamic();
//solutie();
g<<MAX<<"\n";
afisare();
return 0;
}