Submission #525511

#	Time	Username	Problem	Language	Result	Execution time	Memory
525511		anjroo	A Huge Tower (CEOI10_tower)	Java	100 / 100	610 ms	52136 KiB

tower

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

public class tower {
    static final int MOD = (int)1e9 + 9;

    static Kattio io = new Kattio();
    public static void main(String[] args) throws IOException {
        int n = io.nextInt();
        int d = io.nextInt();

        int[] b = new int[n];

        for(int i = 0; i < n; i++) {
            b[i] = io.nextInt();
        }

        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 %= MOD;
        }
        io.println(ans);
        io.close();
    }

    static class Kattio extends PrintWriter {
        private BufferedReader r;
        private StringTokenizer st;
        public Kattio() { this(System.in,System.out); }
        public Kattio(InputStream i, OutputStream o) {
            super(o);
            r = new BufferedReader(new InputStreamReader(i));
        }
        public Kattio(String problemName) throws IOException {
            super(new FileWriter(problemName+".out"));
            r = new BufferedReader(new FileReader(problemName+".in"));
        }
        public String next() {
            try {
                while (st == null || !st.hasMoreTokens())
                    st = new StringTokenizer(r.readLine());
                return st.nextToken();
            } catch (Exception e) {}
            return null;
        }
        public int nextInt() { return Integer.parseInt(next()); }
        public double nextDouble() { return Double.parseDouble(next()); }
        public long nextLong() { return Long.parseLong(next()); }
    }
}

• 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