2 1
1 1
 4 1
2 2 1 1
 10 1
2 6 3 4 2 4 4 3 2 1
 2 1
999152 999153
 8 1000000
1 1 5 1000000 1000000 2 2 2
 9 2
1 6 1 5 5 8 6 8 7
 15 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 1 4
8
 10 1
6 3 1 3 6 4 1 3 6 4
 10 1
1 2 3 5 6 8 10 11 9 4
 7 2
1 5 5 8 9 8 8
 2 1000000
1 1000000
 8 2
3 13 9 8 3 13 9 14
 1 1
1
 2 1
1 2

2
 2
 4
 1
 2
 4
 15
 1
 7
 2
 4
 1
 5
 1
 1

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int n = s.nextInt(), K = s.nextInt();
		int[] arr = new int[1000001];
		for(int i = 0; i < n; i++){
			int x = s.nextInt();
			arr[x]++;
		}
		
		int count = 0;
		for(int i = 0; i < arr.length;){
			if(arr[i] == 0){
				i++;
				continue;
			}else{
				int j = i + 1;
				for(j = i + 1; j < arr.length && j <= i + K; j++){
					if(arr[j] > 0){
						break;
					}
				}
				if(j == i + K + 1 || j == arr.length){
					count += arr[i];
				}
				i = j;
			}
		}
		System.out.println(count);
	}

}