백준 1449

package baekjoon.그리디;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

class Main1449 {

   public static void main(String[] args) throws Exception {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      StringTokenizer st = new StringTokenizer(br.readLine());
      int N = Integer.parseInt(st.nextToken());
      int L = Integer.parseInt(st.nextToken());
      int[] a = new int[N];
      st = new StringTokenizer(br.readLine());
      for (int i = 0; i < N; i++) {
         a[i] = Integer.parseInt(st.nextToken());
      }

      int ans = 0;
      Arrays.sort(a);
      for (int i = 0; i < N; i++) {
         if (i == N - 1) {
            ans++;
            break;
         }

         int tmp = a[i++];
         while (N > i) { //테이프길이 안에 들어오는만큼
            if (a[i] - tmp + 1 <= L) {
               i++;
            } else {
               i--;
               break;
            }
         }
         ans++;
      }
      System.out.println(ans);
   }
}