#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base ::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int n, K;
  cin >> n >> K;
  int *a = new int[n]();
  for (int i = 0; i < n; i++) cin >> a[i];
  sort(a, a + n, greater<int>());
  int count = n;
  for (int i = n - 1; i >= 0; i--) {
    int count_val = 0;
    while (i >= 1 && a[i] == a[i - 1]) {
      count_val++;
      i--;
    }
    if (i >= 1 && a[i - 1] > a[i] && a[i - 1] <= a[i] + K) {
      count = count - count_val - 1;
    }
  }
  cout << count;
  delete[] a;
  return 0;
}
