제출 #735263

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
735263		dxf	A Huge Tower (CEOI10_tower)	Java	100 / 100	674 ms	50640 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 = 1;
		Arrays.sort(sizes);
		int loc = 0;
		for (int i = 0; i < n; i++) {
			while (loc < n-1 && sizes[loc+1]-sizes[i] <= d) {
				loc ++;
			}
			int dist = loc-i+1;
			former = (((long) former) * dist) % 1000000009;
		}
	
		
		System.out.println(former);
	}
}

• Subtask 1: 5 / 5
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• Subtask 20: 5 / 5