제출 #542303

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
542303		RishabhPrabhu	A Huge Tower (CEOI10_tower)	Java	100 / 100	671 ms	50692 KiB

tower

import java.util.*;
import java.io.*;
public class tower {
    public static void main(String[] args) throws IOException{
        BufferedReader f = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(f.readLine());
        int n = Integer.parseInt(st.nextToken());
        int d = Integer.parseInt(st.nextToken());
        int[] b = new int[n];
        st = new StringTokenizer(f.readLine());
        for(int i = 0; i < n; i++) {
            b[i] = Integer.parseInt(st.nextToken());
        }
        Arrays.sort(b);
        long ans = 1;
        int lowerP = 0;
        for(int i = 1; i < n; i++) {
            while(b[lowerP] < b[i]-d) {
                lowerP++;
            }
            ans *= (i - lowerP + 1);
            ans %= 1000000009;
        }
        System.out.println(ans);
    }
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
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• Subtask 20: 5 / 5