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#include <fstream>
#define VMAX 100001
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
void citire();
void rulare();
void afisare();
int v[VMAX], lgmax[VMAX], urm[VMAX], n, Llis, lis;
int main()
{
citire();
rulare();
afisare();
return 0;
}
void citire()
{
int i;
cin >> n;
for (i=1; i<=n; i++) cin >> v[i];
}
void rulare()
{
int i, k;
lgmax[n]=1;
for (k=n-1; k>=1; k--)
{
lgmax[k]=1;
for (i=k+1; i<=n; i++) if ((v[k]<v[i])&&(lgmax[k]<lgmax[i]+1))
{
urm[k]=i;
lgmax[k]=1+lgmax[i];
}
}
}
void afisare()
{
int i;
for (i=1; i<=n; i++)
{
if (lgmax[i]>=Llis)
{
Llis=lgmax[i];
lis=i;
}
}
cout << Llis<< '\n';
for (i=lis; urm[i]; i=urm[i]) cout << v[i]<< ' ';
cout << v[i];
}