#include <iostream>
#include <algorithm>
using namespace std;

int a[10000];

int main() {
    int n, k;
    cin >> n >> k;
    for (int i = 0; i < n; i++) cin >> a[i];
    sort(a, a + n);
    
    int cnt = 0, i = 0;
    while (i < n) {
        cnt++;
        int r = a[i] + k; 
        while (i < n && a[i] <= r) i++;
    }
    cout << cnt << endl;
    return 0;
}