Submission #391085

#	Time	Username	Problem	Language	Result	Execution time	Memory
391085		yu_lim	A Huge Tower (CEOI10_tower)	Java	100 / 100	719 ms	45380 KiB

tower

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

public class tower {

	public static void main(String[] args) throws IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer str = new StringTokenizer(br.readLine());
		int N = Integer.parseInt(str.nextToken());
		int D = Integer.parseInt(str.nextToken());

		int[] block = new int[N];
		str = new StringTokenizer(br.readLine());
		for (int i = 0; i < N; i++)
			block[i] = Integer.parseInt(str.nextToken());
		br.close();

		Arrays.sort(block);
		long ans = 1; // # ways to make a tower with i blocks
		for (int i = 1, j = 0; i < N; i++) {
			while (j < i && block[j] + D < block[i])
				j++;
			ans = ((i - j + 1) * ans) % (1000000009);
		}
		System.out.println(ans);
	}
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 5 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 5 / 5
• Subtask 13: 5 / 5
• Subtask 14: 5 / 5
• Subtask 15: 5 / 5
• Subtask 16: 5 / 5
• Subtask 17: 5 / 5
• Subtask 18: 5 / 5
• Subtask 19: 5 / 5
• Subtask 20: 5 / 5