#include<fstream.h>
#include<iostream.h>
int main()
{ifstream f("scmax.in");
ofstream h("scmax.out");
int i,n,v[100000],max=0,j;
f>>n;
long long a[100000];
for(i=1;i<=n;i++)
f>>a[i];
v[n]=1;
for(i=n-1;i>=1;i=i-1)
	{for(j=i;j<=n;j++)
		if(v[i]<v[j]&&a[i]<a[j])
			v[i]=1+v[j];
		if(v[i]==0)
			v[i]=1;
		if(max<v[i])
			max=v[i];}
cout<<max;
return 0;}