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#include <fstream>
#define NMAX 100002
using namespace std;
ifstream fin ("scmax.in");
ofstream fout ("scmax.out");
int n;
int a[NMAX];
int lgmax[NMAX], lg;
int poz[NMAX];
void pd();
void afisare();
int main()
{
int i;
fin>>n;
for (i=1; i<=n; i++) fin>>a[i];
pd();
afisare();
fin.close();
fout.close();
return 0;
}
void afisare()
{int i, 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];
}
}
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;
}
}
}