#include<bits/stdc++.h>
using namespace std;
int book[100005]={0};
int minn=1e5+1;
int main()
{
	int n,ans=0;
	cin>>n;
	int a[100005];
	for(int i=1;i<=n;i++)
		cin>>a[i];
	sort(a,a+n+1);
	for(int i=1;i<n;i++)
	{
		for(int j=i+1;j<=n;j++)
		{
			if(book[j]==1)
				continue;
			if(minn>a[j]-a[i]&&a[i]!=a[j])
			{
				book[j]=1;
				ans++;
				break;
			}
		}
	}
	cout<<n-ans;
	return 0;
}