#1165790 (Java) No.3535 $E\times - Otogibanashi$

• 問題: No.3535 $E\times - Otogibanashi$
• ユーザー: tenten
• 提出日時: 2026-05-21 11:05:54
• 言語: Java (openjdk 25.0.2)
• 結果: WA
• 実行時間: -
• コード長: 3,619 bytes
• コンパイル時間: 2,314 ms
• コンパイル使用メモリ: 84,708 KB
• 実行使用メモリ: 177,228 KB
• 最終ジャッジ日時: 2026-05-21 11:06:14
• 合計ジャッジ時間: 18,642 ms
• ジャッジサーバーID （参考情報）: judge2_1 / judge3_0

ファイルパターン	結果
sample	AC * 2
other	AC * 14 WA * 7

ソースコード

import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;
import java.math.*;

public class Main {
    public static void main(String[] args) throws Exception {
        FastScanner sc = new FastScanner();
        int n = sc.nextInt();
        int p = sc.nextInt();
        int ans = 0;
        Set<Integer> exists = new HashSet<>();
        for (int i = 100000; i <= 999999; i++) {
            if (check(i)) {
                for (int j = 1; j * i <= n; j++) {
                    int v = j * i;
                    if (!exists.contains(v)) {
                        ans += p - v;
                        ans %= p;
                        exists.add(v);
                    }
                }
            }
        }
        System.out.println(ans);
    }
    
    static boolean check(int x) {
        int[] values = new int[6];
        for (int i = 0; i < 6; i++) {
            values[i] = x % 10;
            x /= 10;
        }
        return values[0] == values[3] && values[1] == values[2] && values[4] == values[5];
    }
} 

class FastScanner {
    private DataInputStream din;
    private byte[] buffer;
    private int bufferPointer, bytesRead;
    private static final int BUFFER_SIZE = 1 << 16; // 65,536 バイト

    public FastScanner() {
        din = new DataInputStream(System.in);
        buffer = new byte[BUFFER_SIZE];
        bufferPointer = bytesRead = 0;
    }

    private byte read() {
        try {
            if (bufferPointer == bytesRead) {
                bytesRead = din.read(buffer, 0, BUFFER_SIZE);
                if (bytesRead == -1) return -1;
                bufferPointer = 0;
            }
            return buffer[bufferPointer++];
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public String next() {
        byte b = read();
        // 空白文字を読み飛ばす
        while (isSpaceChar(b)) {
            b = read();
        }
        StringBuilder sb = new StringBuilder();
        while (!isSpaceChar(b)) {
            sb.append((char) b);
            b = read();
        }
        return sb.toString();
    }

    public int nextInt() {
        int ret = 0;
        byte c = read();
        while (isSpaceChar(c)) c = read();
        boolean neg = (c == '-');
        if (neg) c = read();
        do {
            ret = ret * 10 + c - '0';
            c = read();
        } while (!isSpaceChar(c));
        return neg ? -ret : ret;
    }

    public long nextLong() {
        long ret = 0;
        byte c = read();
        while (isSpaceChar(c)) c = read();
        boolean neg = (c == '-');
        if (neg) c = read();
        do {
            ret = ret * 10L + c - '0';
            c = read();
        } while (!isSpaceChar(c));
        return neg ? -ret : ret;
    }

    public double nextDouble() {
        double ret = 0, div = 1;
        byte c = read();
        while (isSpaceChar(c)) c = read();
        boolean neg = (c == '-');
        if (neg) c = read();
        do {
            ret = ret * 10 + c - '0';
            c = read();
        } while (!isSpaceChar(c) && c != '.');
        if (c == '.') {
            while (!isSpaceChar(c = read())) {
                ret += (c - '0') / (div *= 10);
            }
        }
        return neg ? -ret : ret;
    }

    private boolean isSpaceChar(byte c) {
        return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    }

    public void close() {
        try {
            if (din != null) din.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}