#409768 (Java21) No.955 ax^2+bx+c=0

• 問題: No.955 ax^2+bx+c=0
• ユーザー: 37zigen
• 提出日時: 2019-12-18 01:40:39
• 言語: Java21 (openjdk 21)
• 結果: WA
• 実行時間: -
• コード長: 2,309 bytes
• コンパイル時間: 2,021 ms
• コンパイル使用メモリ: 82,700 KB
• 実行使用メモリ: 54,576 KB
• 最終ジャッジ日時: 2024-07-07 00:12:13
• 合計ジャッジ時間: 17,816 ms
• ジャッジサーバーID （参考情報）: judge3 / judge5

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	109 ms; 54,472 KB
testcase_01	AC	98 ms; 52,924 KB
testcase_02	AC	108 ms; 53,908 KB
testcase_03	AC	108 ms; 54,176 KB
testcase_04	AC	113 ms; 54,368 KB
testcase_05	AC	103 ms; 53,188 KB
testcase_06	AC	97 ms; 52,816 KB
testcase_07	AC	91 ms; 52,780 KB
testcase_08	AC	98 ms; 54,456 KB
testcase_09	AC	98 ms; 53,260 KB
testcase_10	AC	97 ms; 53,188 KB
testcase_11	AC	101 ms; 53,060 KB
testcase_12	AC	105 ms; 54,100 KB
testcase_13	AC	108 ms; 54,272 KB
testcase_14	AC	105 ms; 54,040 KB
testcase_15	AC	99 ms; 53,316 KB
testcase_16	AC	105 ms; 54,232 KB
testcase_17	AC	101 ms; 53,444 KB
testcase_18	AC	98 ms; 52,976 KB
testcase_19	AC	100 ms; 53,200 KB
testcase_20	AC	98 ms; 53,136 KB
testcase_21	AC	108 ms; 54,152 KB
testcase_22	AC	110 ms; 54,424 KB
testcase_23	AC	110 ms; 54,152 KB
testcase_24	AC	100 ms; 53,196 KB
testcase_25	AC	102 ms; 53,160 KB
testcase_26	AC	101 ms; 53,012 KB
testcase_27	AC	103 ms; 53,032 KB
testcase_28	AC	107 ms; 53,320 KB
testcase_29	AC	112 ms; 54,048 KB
testcase_30	AC	111 ms; 54,060 KB
testcase_31	AC	102 ms; 53,180 KB
testcase_32	AC	98 ms; 52,948 KB
testcase_33	AC	111 ms; 54,204 KB
testcase_34	AC	104 ms; 53,296 KB
testcase_35	AC	106 ms; 53,420 KB
testcase_36	AC	113 ms; 54,320 KB
testcase_37	AC	118 ms; 54,260 KB
testcase_38	AC	107 ms; 53,256 KB
testcase_39	AC	109 ms; 53,608 KB
testcase_40	AC	111 ms; 54,284 KB
testcase_41	AC	100 ms; 53,068 KB
testcase_42	AC	109 ms; 53,808 KB
testcase_43	AC	110 ms; 54,152 KB
testcase_44	AC	100 ms; 53,364 KB
testcase_45	AC	105 ms; 53,292 KB
testcase_46	AC	109 ms; 54,088 KB
testcase_47	AC	112 ms; 54,456 KB
testcase_48	AC	101 ms; 53,580 KB
testcase_49	AC	114 ms; 54,356 KB
testcase_50	AC	113 ms; 54,380 KB
testcase_51	AC	101 ms; 53,236 KB
testcase_52	AC	100 ms; 53,372 KB
testcase_53	AC	107 ms; 54,436 KB
testcase_54	AC	118 ms; 54,452 KB
testcase_55	AC	108 ms; 54,036 KB
testcase_56	AC	110 ms; 54,488 KB
testcase_57	AC	99 ms; 53,272 KB
testcase_58	AC	109 ms; 54,576 KB
testcase_59	AC	95 ms; 52,912 KB
testcase_60	AC	98 ms; 53,004 KB
testcase_61	AC	106 ms; 54,104 KB
testcase_62	AC	104 ms; 53,320 KB
testcase_63	AC	101 ms; 53,304 KB
testcase_64	AC	111 ms; 54,156 KB
testcase_65	AC	97 ms; 52,732 KB
testcase_66	AC	93 ms; 52,812 KB
testcase_67	AC	96 ms; 52,540 KB
testcase_68	AC	105 ms; 53,160 KB
testcase_69	AC	111 ms; 54,324 KB
testcase_70	AC	110 ms; 54,184 KB
testcase_71	AC	95 ms; 52,488 KB
testcase_72	AC	95 ms; 52,416 KB
testcase_73	AC	105 ms; 53,308 KB
testcase_74	AC	105 ms; 53,752 KB
testcase_75	AC	106 ms; 54,216 KB
testcase_76	AC	111 ms; 53,912 KB
testcase_77	AC	103 ms; 53,224 KB
testcase_78	AC	103 ms; 53,432 KB
testcase_79	AC	107 ms; 53,304 KB
testcase_80	AC	103 ms; 53,420 KB
testcase_81	AC	111 ms; 54,280 KB
testcase_82	AC	110 ms; 54,208 KB
testcase_83	AC	109 ms; 54,056 KB
testcase_84	AC	93 ms; 52,936 KB
testcase_85	AC	113 ms; 54,212 KB
testcase_86	AC	102 ms; 53,084 KB
testcase_87	AC	104 ms; 52,884 KB
testcase_88	AC	110 ms; 54,176 KB
testcase_89	AC	99 ms; 53,004 KB
testcase_90	AC	96 ms; 52,624 KB
testcase_91	AC	109 ms; 54,316 KB
testcase_92	AC	101 ms; 53,172 KB
testcase_93	AC	101 ms; 53,180 KB
testcase_94	AC	110 ms; 54,172 KB
testcase_95	WA	-
testcase_96	WA	-
testcase_97	AC	110 ms; 54,304 KB
testcase_98	AC	102 ms; 53,224 KB
testcase_99	WA	-
testcase_100	AC	111 ms; 54,256 KB
testcase_101	AC	109 ms; 54,124 KB
testcase_102	AC	107 ms; 54,220 KB
testcase_103	AC	97 ms; 52,892 KB
testcase_104	AC	109 ms; 53,960 KB
testcase_105	AC	108 ms; 54,052 KB
testcase_106	AC	95 ms; 53,120 KB
testcase_107	AC	97 ms; 53,292 KB
testcase_108	AC	114 ms; 54,048 KB
testcase_109	AC	98 ms; 52,880 KB
testcase_110	AC	107 ms; 54,056 KB
testcase_111	AC	97 ms; 53,076 KB
testcase_112	AC	103 ms; 53,168 KB
testcase_113	AC	98 ms; 53,084 KB
testcase_114	AC	95 ms; 54,548 KB
testcase_115	AC	105 ms; 54,272 KB
testcase_116	AC	111 ms; 54,148 KB
testcase_117	AC	98 ms; 53,016 KB
testcase_118	AC	103 ms; 53,140 KB
testcase_119	AC	94 ms; 52,996 KB
testcase_120	AC	97 ms; 53,368 KB
testcase_121	AC	103 ms; 52,980 KB
testcase_122	AC	117 ms; 54,448 KB
testcase_123	AC	119 ms; 54,172 KB
testcase_124	AC	104 ms; 53,288 KB

ソースコード

import java.math.BigDecimal;
import java.math.MathContext;
import java.util.*;
import java.io.*;
import java.math.*;

class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long a = sc.nextLong();
		long b = sc.nextLong();
		long c = sc.nextLong();
//		for (long a = -10; a <= 10; ++a)
//			for (long b = -10; b <= 10; ++b)
//				for (long c = -10; c <= 10; ++c)
		new Main().run(a, b, c);
	}

	void run(long a, long b, long c) {
		if (a < 0) {
			a *= -1;
			b *= -1;
			c *= -1;
		}
		if (a == 0 && b == 0 && c == 0) {// 0x^2+0x+0=0
			System.out.println(-1);
			return;
		} else if (a == 0 && b == 0 && c != 0) {// 0x^2+0x+c=0
			System.out.println(0);
		} else if (a == 0) {// 0x^2+bx+c=0
			// b!=0
			System.out.println(1);
			System.out.println(-(double) c / b);
		} else if (a != 0) {
			BigDecimal DD = BigDecimal.valueOf(b * b)
					.subtract(BigDecimal.valueOf(4).multiply(BigDecimal.valueOf(a * c)));
			if (DD.compareTo(BigDecimal.ZERO) == -1) {
				System.out.println(0);
			} else if (DD.compareTo(BigDecimal.ZERO) == 0) {
				System.out.println(1);
				System.out.println(BigDecimal.valueOf(-b).divide(BigDecimal.valueOf(2 * a), BigDecimal.ROUND_HALF_UP)
						.doubleValue());
			} else {
				System.out.println(2);
				double x1 = BigDecimal.valueOf(-b).subtract(sqrt(DD, 50))
						.divide(BigDecimal.valueOf(2 * a), BigDecimal.ROUND_HALF_UP).doubleValue();
				double x2 = BigDecimal.valueOf(-b).add(sqrt(DD, 50))
						.divide(BigDecimal.valueOf(2 * a), BigDecimal.ROUND_HALF_UP).doubleValue();// (double)(-b+Math.sqrt(DD))/(2*a));
				if (x1 > x2) {
					double tmp = x1;
					x1 = x2;
					x2 = tmp;
				}
				System.out.println(x1);
				System.out.println(x2);
			}

		}
	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

	public static BigDecimal sqrt(BigDecimal a, int scale) {
		// とりあえずdoubleのsqrtを求める
		BigDecimal x = new BigDecimal(Math.sqrt(a.doubleValue()), MathContext.DECIMAL64);
		if (scale < 17)
			return x;

		BigDecimal b2 = new BigDecimal(2);
		for (int tempScale = 16; tempScale < scale; tempScale *= 2) {
			// x = x - (x * x - a) / (2 * x);
			x = x.subtract(x.multiply(x).subtract(a).divide(x.multiply(b2), scale, BigDecimal.ROUND_HALF_EVEN));
		}
		return x;
	}
}