結果

問題 No.3110 Like CPCTF?
コンテスト
ユーザー tenten
提出日時 2025-04-21 16:29:28
言語 Java
(openjdk 23)
結果
AC  
実行時間 56 ms / 2,000 ms
コード長 3,811 bytes
コンパイル時間 2,384 ms
コンパイル使用メモリ 80,716 KB
実行使用メモリ 50,916 KB
最終ジャッジ日時 2025-04-21 16:29:32
合計ジャッジ時間 4,307 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 16
権限があれば一括ダウンロードができます

ソースコード

diff # 

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

public class Main {
    public static void main(String[] args) throws Exception {
        FastScanner sc = new FastScanner();
        int n = sc.nextInt();
        char[] inputs = sc.next().toCharArray();
        int ans = 0;
        for (int a = 0; a < n; a++) {
            for (int b = a + 1; b < n; b++) {
                if (inputs[a] == inputs[b]) {
                    continue;
                }
                for (int c = b + 1; c < n; c++) {
                    if (inputs[a] != inputs[c]) {
                        continue;
                    }
                    for (int d = c + 1; d < n; d++) {
                        if (inputs[a] == inputs[d] || inputs[b] == inputs[d]) {
                            continue;
                        }
                        for (int e = d + 1; e < n; e++) {
                            if (inputs[a] == inputs[e] || inputs[b] == inputs[e] || inputs[d] == inputs[e]) {
                                continue;
                            }
                            ans++;
                        }
                    }
                }
            }
        }
        System.out.println(ans);
    }
}

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);
        }
    }
}
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