제출 #326850

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
326850		shliao	A Huge Tower (CEOI10_tower)	Java	100 / 100	924 ms	49676 KiB

tower

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

public class tower {
	static int mod = 1000000009;
	public static void main(String[]args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		StringTokenizer st = new StringTokenizer(br.readLine());
		int N = Integer.parseInt(st.nextToken());
		int D = Integer.parseInt(st.nextToken());
		
		st = new StringTokenizer(br.readLine());
		int[]blocks = new int[N];
		for(int i = 0; i<N; i++) {
			blocks[i] = Integer.parseInt(st.nextToken());
		}
		Arrays.sort(blocks);
		
		int[]stack = new int[N];
		
		int j = 0;
		for(int i = 0; i<N; i++) {
			while(j<N && blocks[j]-blocks[i]<=D) j++;
			stack[i] = j-i;
			
		}
		
		long ans = 1;
		for(int i = 0; i<N; i++) {
			ans = (stack[i]*ans)%mod;
		}
		
		System.out.println(ans);
		
		
		
	}
}

• Subtask 1: 5 / 5
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