#include<stdio.h>
int main()
{
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	int n,a[100005],i,j,max=0;
	scanf("%d",&n);
	for(i=1;i<=n;++i)
		scanf("%d",&a[i]);
	lung[1]=1;
	for(i=2;i<=n;++i)
	{
		max=0;
		for(j=1;j<i;++j)
		{
			if(a[j]>a[i]) continue;
			if(lung[j]>max) max=lung[j];
		}
		lung[i]=max+1;
	}
	printf("%d",max);
	return 0;
}