bonus

import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;
import java.util.*;

class Result {

    public static int hackerlandRadioTransmitters(List<Integer> x, int k) {
        Collections.sort(x);
        int n = x.size();
        int[] dp = new int[n];
        Arrays.fill(dp, Integer.MAX_VALUE);
        dp[0] = 1; // Base case: one transmitter for the first house

        int lastTransmitterIndex = 0; // Tracks the last house where a transmitter was placed
        for (int i = 1; i < n; i++) {
            // Check if the current house can be covered by the last transmitter
            if (x.get(i) <= x.get(lastTransmitterIndex) + k) {
                dp[i] = dp[lastTransmitterIndex];
            } else {
                // Find the next house to place a transmitter
                lastTransmitterIndex = i;
                dp[i] = dp[i - 1] + 1;
            }
        }

        return dp[n - 1];
    }
}

public class Solution {
     public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

        int n = Integer.parseInt(firstMultipleInput[0]);
        int k = Integer.parseInt(firstMultipleInput[1]);

        List<Integer> x = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))
            .map(Integer::parseInt)
            .collect(toList());

        int result = Result.hackerlandRadioTransmitters(x, k);

        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedReader.close();
        bufferedWriter.close();
    }
}