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#include <fstream>
#define NMAX 1000002
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[NMAX];
int lgmax[NMAX];
int poz[NMAX];
int n;
void citire();
void pd();
void afisare();
int main()
{
citire();
pd();
afisare();
return 0;
}
void citire()
{
int i;
fin>>n;
for(i=1; i<=n; i++)
fin>>a[i];
}
void pd()
{
int i,j;
lgmax[n]=1;
poz[n]=0;
for(i=n-1; i>0; i--)
{
lgmax[i]=1;
poz[i]=0;
for(j=i+1; j<=n; j++)
if(a[i]<a[j])
if(lgmax[i]<1+lgmax[j])
{
lgmax[i]=1+lgmax[j];
poz[i]=j;
}
}
}
void afisare()
{
int i,lg,unde;
lg=0;
for(i=1; i<=n; i++)
if(lg<lgmax[i])
lg=lgmax[i],unde=i;
fout<<lg<<'\n';
while(unde)
{
fout<<a[unde]<<" ";
unde=poz[unde];
}
fout<<'\n';
}