제출 #735261

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
735261		dxf	A Huge Tower (CEOI10_tower)	Java	30 / 100	1040 ms	51692 KiB

tower

// Source: https://usaco.guide/general/io

import java.io.*;
import java.util.*;

public class tower {
	public static void main(String[] args) throws IOException {
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in));

		StringTokenizer st = new StringTokenizer(r.readLine());
		int n = Integer.parseInt(st.nextToken());
		int d = Integer.parseInt(st.nextToken());
		
		int[] sizes = new int[n];
		st = new StringTokenizer(r.readLine());
		for (int i = 0; i < n; i++) {
			sizes[i] = Integer.parseInt(st.nextToken());
		}
		long[] former = new long[n];
		former[0] = 1; 
		Arrays.sort(sizes);
		for (int i = 1; i < n; i++) {
			long count = 1;
			int loc = i-1;;
			while (loc >= 0 && sizes[loc]+d >= sizes[i]) {
				count ++;
				loc--;
			}
			former[i] = ((long) former[i-1]) * count;
		}
	
		
		System.out.println(former[n-1]);
	}
}

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