#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long n, k;
  cin >> n >> k;
  map<long long, long long> d;
  for (long long i = (0); i < (long long)(n); i++) {
    long long x;
    cin >> x;
    d[x]++;
  }
  long long total = n;
  for (auto &z : d) {
    long long x = z.first;
    auto it = d.lower_bound(x - k);
    vector<long long> erase;
    while (it->first < x) {
      total -= it->second;
      erase.push_back(it->first);
      it++;
    }
    for (auto &x : erase) {
      d.erase(x);
    }
  }
  printf("%lld\n", total);
}
