#157088 (Java21) No.491 10^9+1と回文

• 問題: No.491 10^9+1と回文
• ユーザー: Grenache
• 提出日時: 2017-03-11 00:19:15
• 言語: Java21 (openjdk 21)
• 結果: AC
• 実行時間: 248 ms / 1,000 ms
• コード長: 1,853 bytes
• コンパイル時間: 3,634 ms
• コンパイル使用メモリ: 79,196 KB
• 実行使用メモリ: 60,884 KB
• 最終ジャッジ日時: 2024-10-01 08:25:32
• 合計ジャッジ時間: 30,879 ms
• ジャッジサーバーID （参考情報）: judge5 / judge3

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	240 ms; 59,732 KB
testcase_01	AC	243 ms; 60,056 KB
testcase_02	AC	230 ms; 59,288 KB
testcase_03	AC	248 ms; 59,824 KB
testcase_04	AC	228 ms; 59,476 KB
testcase_05	AC	231 ms; 59,176 KB
testcase_06	AC	226 ms; 59,780 KB
testcase_07	AC	230 ms; 59,924 KB
testcase_08	AC	221 ms; 59,300 KB
testcase_09	AC	236 ms; 60,416 KB
testcase_10	AC	233 ms; 59,948 KB
testcase_11	AC	237 ms; 59,720 KB
testcase_12	AC	231 ms; 59,984 KB
testcase_13	AC	233 ms; 60,208 KB
testcase_14	AC	234 ms; 60,000 KB
testcase_15	AC	232 ms; 59,736 KB
testcase_16	AC	238 ms; 60,032 KB
testcase_17	AC	242 ms; 59,616 KB
testcase_18	AC	232 ms; 59,280 KB
testcase_19	AC	231 ms; 59,920 KB
testcase_20	AC	230 ms; 59,288 KB
testcase_21	AC	229 ms; 60,388 KB
testcase_22	AC	220 ms; 59,400 KB
testcase_23	AC	228 ms; 59,820 KB
testcase_24	AC	227 ms; 59,864 KB
testcase_25	AC	235 ms; 60,184 KB
testcase_26	AC	213 ms; 59,412 KB
testcase_27	AC	236 ms; 59,716 KB
testcase_28	AC	236 ms; 59,556 KB
testcase_29	AC	231 ms; 59,344 KB
testcase_30	AC	237 ms; 59,836 KB
testcase_31	AC	230 ms; 59,436 KB
testcase_32	AC	230 ms; 59,792 KB
testcase_33	AC	239 ms; 59,840 KB
testcase_34	AC	225 ms; 58,940 KB
testcase_35	AC	227 ms; 59,460 KB
testcase_36	AC	222 ms; 59,500 KB
testcase_37	AC	235 ms; 59,888 KB
testcase_38	AC	236 ms; 59,744 KB
testcase_39	AC	235 ms; 59,584 KB
testcase_40	AC	234 ms; 60,332 KB
testcase_41	AC	227 ms; 59,192 KB
testcase_42	AC	229 ms; 59,228 KB
testcase_43	AC	217 ms; 59,508 KB
testcase_44	AC	222 ms; 59,412 KB
testcase_45	AC	219 ms; 59,368 KB
testcase_46	AC	234 ms; 60,252 KB
testcase_47	AC	221 ms; 59,036 KB
testcase_48	AC	236 ms; 59,700 KB
testcase_49	AC	230 ms; 59,392 KB
testcase_50	AC	225 ms; 60,220 KB
testcase_51	AC	220 ms; 59,080 KB
testcase_52	AC	232 ms; 59,264 KB
testcase_53	AC	232 ms; 59,700 KB
testcase_54	AC	238 ms; 60,068 KB
testcase_55	AC	224 ms; 59,308 KB
testcase_56	AC	237 ms; 59,264 KB
testcase_57	AC	248 ms; 60,312 KB
testcase_58	AC	239 ms; 60,424 KB
testcase_59	AC	228 ms; 59,952 KB
testcase_60	AC	225 ms; 60,156 KB
testcase_61	AC	240 ms; 60,184 KB
testcase_62	AC	227 ms; 59,304 KB
testcase_63	AC	216 ms; 60,020 KB
testcase_64	AC	234 ms; 60,132 KB
testcase_65	AC	234 ms; 59,244 KB
testcase_66	AC	237 ms; 59,592 KB
testcase_67	AC	227 ms; 59,492 KB
testcase_68	AC	228 ms; 59,384 KB
testcase_69	AC	240 ms; 59,972 KB
testcase_70	AC	230 ms; 59,400 KB
testcase_71	AC	224 ms; 59,920 KB
testcase_72	AC	212 ms; 59,360 KB
testcase_73	AC	222 ms; 59,348 KB
testcase_74	AC	242 ms; 60,884 KB
testcase_75	AC	221 ms; 59,532 KB
testcase_76	AC	215 ms; 59,248 KB
testcase_77	AC	228 ms; 58,696 KB
testcase_78	AC	216 ms; 59,040 KB
testcase_79	AC	224 ms; 59,572 KB
testcase_80	AC	223 ms; 59,160 KB
testcase_81	AC	217 ms; 58,972 KB
testcase_82	AC	224 ms; 59,544 KB
testcase_83	AC	231 ms; 59,640 KB
testcase_84	AC	237 ms; 60,212 KB
testcase_85	AC	230 ms; 60,096 KB
testcase_86	AC	235 ms; 59,372 KB
testcase_87	AC	233 ms; 59,992 KB
testcase_88	AC	228 ms; 59,104 KB
testcase_89	AC	215 ms; 59,204 KB
testcase_90	AC	240 ms; 60,328 KB
testcase_91	AC	234 ms; 59,844 KB
testcase_92	AC	226 ms; 59,052 KB
testcase_93	AC	230 ms; 59,804 KB
testcase_94	AC	239 ms; 59,788 KB
testcase_95	AC	239 ms; 59,228 KB
testcase_96	AC	238 ms; 59,784 KB
testcase_97	AC	230 ms; 60,020 KB
testcase_98	AC	230 ms; 59,956 KB
testcase_99	AC	247 ms; 60,444 KB
testcase_100	AC	247 ms; 59,888 KB
testcase_101	AC	219 ms; 59,768 KB
testcase_102	AC	214 ms; 60,004 KB
testcase_103	AC	235 ms; 60,632 KB
testcase_104	AC	232 ms; 59,804 KB
testcase_105	AC	220 ms; 58,940 KB

ソースコード

import java.io.*;
import java.util.*;


public class Main_yukicoder491 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		long n = sc.nextLong();

		long t = 1_000_000_001;

		int ret = 0;
		for (int i = 1; i < 10_000; i++) {
			if (i % 10 == 0) {
				continue;
			}

			StringBuilder tmp = new StringBuilder();
			tmp.append(i);
			if (t * i <= n) {
				if (isPalindrome(tmp)) {
					ret++;
				}
			}

			while (tmp.length() <= 4) {
				int m = tmp.length();

				StringBuilder tmp2 = new StringBuilder();
				for (int j = 0; j < m; j++) {
					tmp2.append(tmp.charAt(m - 1 - j));
				}
				for (int j = 0; j < m; j++) {
					tmp2.append(tmp.charAt(j));
				}
				long ltmp = Long.parseLong(tmp2.toString());
				if (ltmp > 9999 && ltmp < 1_000_000_000 && t * ltmp <= n) {
					ret++;
				}

				for (int c = 0; c < 10; c++) {
					tmp2 = new StringBuilder();
					for (int j = 0; j < m; j++) {
						tmp2.append(tmp.charAt(m - 1 - j));
					}
					tmp2.append((char)('0' + c));
					for (int j = 0; j < m; j++) {
						tmp2.append(tmp.charAt(j));
					}
					ltmp = Long.parseLong(tmp2.toString());
					if (ltmp > 9999 && ltmp < 1_000_000_000 && t * ltmp <= n) {
						ret++;
					}
				}

				tmp.insert(0, '0');
			}
		}

		pr.println(ret);
	}

	private static boolean isPalindrome(StringBuilder str) {
		int n = str.length();

		boolean flag = true;
		for (int i = 0; i < n / 2; i++) {
			if (str.charAt(i) != str.charAt(n - 1 - i)) {
				flag = false;
				break;
			}
		}

		return flag;
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}