#include<iostream>
#include<cstdlib>
#include<cstring>
#include<cstdio>
#include<cmath>
using namespace std;
long long n,d,a[1000001],cnt,l=1,r=2;
int main()
{
	cin>>n>>d;
	for(int i=1; i<=n; i++)
	{
		cin>>a[i];
	}
	while(l<n)
	{  
		if(abs(a[l]-a[r])<=d)
		{
			++cnt;
			r++;
		}
		else
		{
			++l;
			r=l+1;
		}
	}
	cout<<cnt;
	return 0;
}