#include <stdio.h>

int v[100002];
int lung[100002];

int main()
{
	int max;
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	scanf("%d",&v[0]);
	for(int i=1;i<=v[0];i++)
		scanf("%d",&v[i]);
	
	for(int i=1;i<=v[0];i++)
	{	max=lung[i];
		for(int j=1;j<i;j++)
			if(v[i]>v[j]) 
				if(max<lung[j]) max=lung[j];
		lung[i]=max+1;
	}
	
	max=1;
	for(int i=1;i<=v[0];i++)
		if(max<lung[i]) max=lung[i]);
	printf("%d\n",max);
	fclose(stdin);
	fclose(stdout);
	return 0;
}