#409734 (Java21) No.955 ax^2+bx+c=0

• 問題: No.955 ax^2+bx+c=0
• ユーザー: ks2m
• 提出日時: 2019-12-18 00:54:53
• 言語: Java21 (openjdk 21)
• 結果: AC
• 実行時間: 79 ms / 2,000 ms
• コード長: 1,911 bytes
• コンパイル時間: 5,288 ms
• コンパイル使用メモリ: 79,688 KB
• 実行使用メモリ: 55,676 KB
• 最終ジャッジ日時: 2023-10-19 02:02:45
• 合計ジャッジ時間: 13,627 ms
• ジャッジサーバーID （参考情報）: judge14 / judge13

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	70 ms; 54,640 KB
testcase_01	AC	56 ms; 52,516 KB
testcase_02	AC	57 ms; 53,528 KB
testcase_03	AC	56 ms; 53,520 KB
testcase_04	AC	55 ms; 53,536 KB
testcase_05	AC	55 ms; 53,528 KB
testcase_06	AC	55 ms; 53,520 KB
testcase_07	AC	56 ms; 53,468 KB
testcase_08	AC	55 ms; 52,436 KB
testcase_09	AC	55 ms; 53,536 KB
testcase_10	AC	55 ms; 52,420 KB
testcase_11	AC	56 ms; 53,528 KB
testcase_12	AC	57 ms; 53,520 KB
testcase_13	AC	57 ms; 52,512 KB
testcase_14	AC	56 ms; 53,524 KB
testcase_15	AC	55 ms; 53,472 KB
testcase_16	AC	55 ms; 53,520 KB
testcase_17	AC	55 ms; 53,532 KB
testcase_18	AC	55 ms; 53,472 KB
testcase_19	AC	57 ms; 52,432 KB
testcase_20	AC	56 ms; 53,524 KB
testcase_21	AC	56 ms; 53,528 KB
testcase_22	AC	55 ms; 53,536 KB
testcase_23	AC	55 ms; 53,532 KB
testcase_24	AC	56 ms; 53,536 KB
testcase_25	AC	57 ms; 53,528 KB
testcase_26	AC	55 ms; 52,404 KB
testcase_27	AC	56 ms; 53,540 KB
testcase_28	AC	55 ms; 53,532 KB
testcase_29	AC	56 ms; 53,524 KB
testcase_30	AC	56 ms; 53,536 KB
testcase_31	AC	56 ms; 53,532 KB
testcase_32	AC	56 ms; 53,528 KB
testcase_33	AC	56 ms; 53,528 KB
testcase_34	AC	79 ms; 53,700 KB
testcase_35	AC	76 ms; 54,696 KB
testcase_36	AC	78 ms; 54,696 KB
testcase_37	AC	72 ms; 54,672 KB
testcase_38	AC	70 ms; 54,656 KB
testcase_39	AC	68 ms; 54,180 KB
testcase_40	AC	77 ms; 54,940 KB
testcase_41	AC	77 ms; 54,648 KB
testcase_42	AC	75 ms; 54,764 KB
testcase_43	AC	72 ms; 54,188 KB
testcase_44	AC	68 ms; 54,092 KB
testcase_45	AC	66 ms; 54,112 KB
testcase_46	AC	69 ms; 54,648 KB
testcase_47	AC	67 ms; 54,668 KB
testcase_48	AC	65 ms; 54,620 KB
testcase_49	AC	75 ms; 54,708 KB
testcase_50	AC	79 ms; 55,676 KB
testcase_51	AC	74 ms; 54,776 KB
testcase_52	AC	70 ms; 54,096 KB
testcase_53	AC	69 ms; 54,652 KB
testcase_54	AC	68 ms; 54,572 KB
testcase_55	AC	78 ms; 54,612 KB
testcase_56	AC	78 ms; 54,752 KB
testcase_57	AC	77 ms; 54,744 KB
testcase_58	AC	69 ms; 54,648 KB
testcase_59	AC	67 ms; 54,108 KB
testcase_60	AC	56 ms; 53,520 KB
testcase_61	AC	55 ms; 53,516 KB
testcase_62	AC	72 ms; 54,688 KB
testcase_63	AC	73 ms; 54,656 KB
testcase_64	AC	56 ms; 53,532 KB
testcase_65	AC	73 ms; 54,188 KB
testcase_66	AC	57 ms; 53,540 KB
testcase_67	AC	72 ms; 54,180 KB
testcase_68	AC	56 ms; 53,532 KB
testcase_69	AC	72 ms; 54,648 KB
testcase_70	AC	73 ms; 54,084 KB
testcase_71	AC	57 ms; 53,520 KB
testcase_72	AC	57 ms; 53,528 KB
testcase_73	AC	71 ms; 54,568 KB
testcase_74	AC	74 ms; 54,092 KB
testcase_75	AC	57 ms; 53,516 KB
testcase_76	AC	56 ms; 53,524 KB
testcase_77	AC	71 ms; 53,336 KB
testcase_78	AC	72 ms; 54,636 KB
testcase_79	AC	72 ms; 54,104 KB
testcase_80	AC	56 ms; 53,536 KB
testcase_81	AC	71 ms; 54,092 KB
testcase_82	AC	56 ms; 53,528 KB
testcase_83	AC	58 ms; 52,464 KB
testcase_84	AC	57 ms; 52,464 KB
testcase_85	AC	58 ms; 53,552 KB
testcase_86	AC	57 ms; 53,556 KB
testcase_87	AC	56 ms; 53,532 KB
testcase_88	AC	57 ms; 53,532 KB
testcase_89	AC	56 ms; 53,528 KB
testcase_90	AC	56 ms; 53,560 KB
testcase_91	AC	55 ms; 53,560 KB
testcase_92	AC	57 ms; 53,536 KB
testcase_93	AC	56 ms; 53,520 KB
testcase_94	AC	58 ms; 53,556 KB
testcase_95	AC	56 ms; 53,564 KB
testcase_96	AC	56 ms; 53,548 KB
testcase_97	AC	55 ms; 53,556 KB
testcase_98	AC	58 ms; 53,556 KB
testcase_99	AC	56 ms; 53,560 KB
testcase_100	AC	55 ms; 53,516 KB
testcase_101	AC	56 ms; 53,560 KB
testcase_102	AC	56 ms; 53,556 KB
testcase_103	AC	56 ms; 53,548 KB
testcase_104	AC	57 ms; 53,548 KB
testcase_105	AC	56 ms; 53,544 KB
testcase_106	AC	56 ms; 53,556 KB
testcase_107	AC	57 ms; 53,556 KB
testcase_108	AC	56 ms; 53,552 KB
testcase_109	AC	58 ms; 53,576 KB
testcase_110	AC	56 ms; 53,548 KB
testcase_111	AC	57 ms; 51,504 KB
testcase_112	AC	56 ms; 53,552 KB
testcase_113	AC	56 ms; 53,560 KB
testcase_114	AC	56 ms; 53,568 KB
testcase_115	AC	56 ms; 53,548 KB
testcase_116	AC	56 ms; 52,460 KB
testcase_117	AC	57 ms; 52,548 KB
testcase_118	AC	56 ms; 53,564 KB
testcase_119	AC	56 ms; 53,560 KB
testcase_120	AC	57 ms; 53,564 KB
testcase_121	AC	58 ms; 51,508 KB
testcase_122	AC	71 ms; 54,632 KB
testcase_123	AC	69 ms; 54,680 KB
testcase_124	AC	70 ms; 54,684 KB

ソースコード

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.math.BigDecimal;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] sa = br.readLine().split(" ");
		long a = Integer.parseInt(sa[0]);
		long b = Integer.parseInt(sa[1]);
		long c = Integer.parseInt(sa[2]);
		br.close();

		if (a == 0) {
			if (b == 0) {
				if (c == 0) {
					System.out.println(-1);
				} else {
					System.out.println(0);
				}
			} else {
				System.out.println(1);
				System.out.println((double) -c / b);
			}
		} else if (b * b == 4 * a * c) {
			System.out.println(1);
			System.out.println((double) -b / 2 / a);
		} else if (b * b > 4 * a * c) {
			long d = b * b - 4 * a * c;
			BigDecimal bd = BigDecimal.valueOf(d);
			long e = (long) Math.sqrt(d);
			if (e * e > d) {
				e--;
			}
			BigDecimal sq = BigDecimal.valueOf(e);
			StringBuilder sb = new StringBuilder("0.");
			for (int i = 0; i < 20; i++) {
				for (int j = 0; j < 10; j++) {
					BigDecimal v = new BigDecimal(sb.toString() + "1");
					BigDecimal tmp = sq.add(v);
					tmp = tmp.multiply(tmp);
					if (tmp.compareTo(bd) > 0) {
						break;
					}
					sq = sq.add(v);
				}
				sb.append("0");
			}
			System.out.println(2);
			BigDecimal ba = BigDecimal.valueOf(a);
			BigDecimal two = BigDecimal.valueOf(2);
			BigDecimal mb = BigDecimal.valueOf(b).negate();
			BigDecimal ans1 = mb.subtract(sq).divide(two).divide(ba, 20, BigDecimal.ROUND_HALF_UP);
			BigDecimal ans2 = mb.add(sq).divide(two).divide(ba, 20, BigDecimal.ROUND_HALF_UP);
			if (ans1.compareTo(ans2) < 0) {
				System.out.println(ans1.toPlainString());
				System.out.println(ans2.toPlainString());
			} else {
				System.out.println(ans2.toPlainString());
				System.out.println(ans1.toPlainString());
			}
		} else {
			System.out.println(0);
		}
	}
}