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#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int v[100001],lung[100001],pred[100001];
int n;
void Read()
{
fin>>n;
for (int i=1;i<=n;i++) fin>>v[i];
}
void sir(int p)
{
if (pred[p]!=0)
sir(pred[p]);
fout<<v[p]<<' ';
}
int main()
{
Read();
int pmax=1;
lung[1]=1;
pred[1]=0;
for (int i=2;i<=n;i++) {
lung[i]=0;
for (int j=1;j<i;j++)
if (v[j]<v[i])
if (lung[j]>lung[i]) {
lung[i]=lung[j];
pred[i]=j;
}
lung[i]++;
if (lung[i]>lung[pmax]) pmax=i;
}
fout<<lung[pmax]<<'\n';
// sir(pmax);
}