#67748 (Java) No.328 きれいな連立方程式

• 問題: No.328 きれいな連立方程式
• ユーザー: Grenache
• 提出日時: 2015-12-21 19:56:48
• 言語: Java (openjdk 23)
• 結果: AC
• 実行時間: 58 ms / 2,000 ms
• コード長: 3,118 bytes
• コンパイル時間: 4,281 ms
• コンパイル使用メモリ: 79,572 KB
• 実行使用メモリ: 50,496 KB
• 最終ジャッジ日時: 2024-09-18 18:05:51
• 合計ジャッジ時間: 7,199 ms
• ジャッジサーバーID （参考情報）: judge4 / judge1

ファイルパターン	結果
other	AC * 31

ソースコード

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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.Iterator;
public class Main_yukicoder328 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Printer pr = new Printer(System.out);
        long c1 = sc.nextInt();
        long c2 = sc.nextInt();
        long c3 = sc.nextInt();
        long c4 = sc.nextInt();
        long a3 = c1 * c1 * c3 - c1 * c2 * c2;
        long a2 = c2 * c2 * c2 - c1 * c1 * c4;
        long a1 = - c1 * c3 * c3 - c2 * c2 * c3 + 2L * c1 * c2 * c4;
        long a0 = c2 * c3 * c3 - c2 * c2 * c4;
        BigInteger ba3 = new BigInteger(Long.toString(a3));
        BigInteger ba2 = new BigInteger(Long.toString(a2));
        BigInteger ba1 = new BigInteger(Long.toString(a1));
        BigInteger ba0 = new BigInteger(Long.toString(a0));
//        long d = -4L * a1 * a1 * a1 * a3 + a1 * a1 * a2 * a2 -4L * a0 * a2 * a2 * a2 + 18L * a0 * a1 * a2 * a3 -27L * a0 * a0 * a3 * a3;
        BigInteger tmp1 = new BigInteger(Long.toString(-4));
        tmp1 = tmp1.multiply(ba1).multiply(ba1).multiply(ba1).multiply(ba3);
        BigInteger tmp2 = new BigInteger(Long.toString(1));
        tmp2 = tmp2.multiply(ba1).multiply(ba1).multiply(ba2).multiply(ba2);
        BigInteger tmp3 = new BigInteger(Long.toString(-4));
        tmp3 = tmp3.multiply(ba0).multiply(ba2).multiply(ba2).multiply(ba2);
        BigInteger tmp4 = new BigInteger(Long.toString(18));
        tmp4 = tmp4.multiply(ba0).multiply(ba1).multiply(ba2).multiply(ba3);
        BigInteger tmp5 = new BigInteger(Long.toString(-27));
        tmp5 = tmp5.multiply(ba0).multiply(ba0).multiply(ba3).multiply(ba3);
        BigInteger d = tmp1.add(tmp2).add(tmp3).add(tmp4).add(tmp5);
        if (d.compareTo(BigInteger.ZERO) >= 0) {
            pr.println("R");
        } else {
            pr.println("I");
        }
        pr.close();
        sc.close();
    }
    @SuppressWarnings("unused")
    private static class Scanner {
        BufferedReader br;
        Iterator<String> it;
        Scanner (InputStream in) {
            br = new BufferedReader(new InputStreamReader(in));
        }
        String next() throws RuntimeException  {
            try {
                if (it == null || !it.hasNext()) {
                    it = Arrays.asList(br.readLine().split(" ")).iterator();
                }
                return it.next();
            } catch (IOException e) {
                throw new IllegalStateException();
            }
        }
        int nextInt() throws RuntimeException {
            return Integer.parseInt(next());
        }
        long nextLong() throws RuntimeException {
            return Long.parseLong(next());
        }
        float nextFloat() throws RuntimeException {
            return Float.parseFloat(next());
        }
        double nextDouble() throws RuntimeException {
            return Double.parseDouble(next());
        }
        void close() {
            try {
                br.close();
            } catch (IOException e) {
//              throw new IllegalStateException();
            }
        }
    }
    private static class Printer extends PrintWriter {
        Printer(PrintStream out) {
            super(out);
        }
    }
}
 
 
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