#354355 (C) No.491 10^9+1と回文

• 問題: No.491 10^9+1と回文
• ユーザー: bal4u
• 提出日時: 2019-06-27 20:17:06
• 言語: C (gcc 12.3.0)
• 結果: AC
• 実行時間: 1 ms / 1,000 ms
• コード長: 1,530 bytes
• コンパイル時間: 1,156 ms
• コンパイル使用メモリ: 30,976 KB
• 実行使用メモリ: 5,376 KB
• 最終ジャッジ日時: 2024-06-28 12:37:52
• 合計ジャッジ時間: 2,909 ms
• ジャッジサーバーID （参考情報）: judge5 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 5,248 KB
testcase_01	AC	1 ms; 5,376 KB
testcase_02	AC	1 ms; 5,376 KB
testcase_03	AC	1 ms; 5,376 KB
testcase_04	AC	1 ms; 5,376 KB
testcase_05	AC	1 ms; 5,376 KB
testcase_06	AC	1 ms; 5,376 KB
testcase_07	AC	1 ms; 5,376 KB
testcase_08	AC	1 ms; 5,376 KB
testcase_09	AC	1 ms; 5,376 KB
testcase_10	AC	1 ms; 5,376 KB
testcase_11	AC	1 ms; 5,376 KB
testcase_12	AC	1 ms; 5,376 KB
testcase_13	AC	1 ms; 5,376 KB
testcase_14	AC	1 ms; 5,376 KB
testcase_15	AC	1 ms; 5,376 KB
testcase_16	AC	1 ms; 5,376 KB
testcase_17	AC	1 ms; 5,376 KB
testcase_18	AC	1 ms; 5,376 KB
testcase_19	AC	1 ms; 5,376 KB
testcase_20	AC	1 ms; 5,376 KB
testcase_21	AC	1 ms; 5,376 KB
testcase_22	AC	1 ms; 5,376 KB
testcase_23	AC	1 ms; 5,376 KB
testcase_24	AC	1 ms; 5,376 KB
testcase_25	AC	1 ms; 5,376 KB
testcase_26	AC	1 ms; 5,376 KB
testcase_27	AC	1 ms; 5,376 KB
testcase_28	AC	1 ms; 5,376 KB
testcase_29	AC	1 ms; 5,376 KB
testcase_30	AC	1 ms; 5,376 KB
testcase_31	AC	1 ms; 5,376 KB
testcase_32	AC	1 ms; 5,376 KB
testcase_33	AC	1 ms; 5,376 KB
testcase_34	AC	1 ms; 5,376 KB
testcase_35	AC	1 ms; 5,376 KB
testcase_36	AC	1 ms; 5,376 KB
testcase_37	AC	1 ms; 5,376 KB
testcase_38	AC	1 ms; 5,376 KB
testcase_39	AC	1 ms; 5,376 KB
testcase_40	AC	1 ms; 5,376 KB
testcase_41	AC	1 ms; 5,376 KB
testcase_42	AC	1 ms; 5,376 KB
testcase_43	AC	1 ms; 5,376 KB
testcase_44	AC	1 ms; 5,376 KB
testcase_45	AC	1 ms; 5,376 KB
testcase_46	AC	1 ms; 5,376 KB
testcase_47	AC	1 ms; 5,376 KB
testcase_48	AC	1 ms; 5,376 KB
testcase_49	AC	1 ms; 5,376 KB
testcase_50	AC	1 ms; 5,376 KB
testcase_51	AC	1 ms; 5,376 KB
testcase_52	AC	1 ms; 5,376 KB
testcase_53	AC	1 ms; 5,376 KB
testcase_54	AC	1 ms; 5,376 KB
testcase_55	AC	1 ms; 5,376 KB
testcase_56	AC	1 ms; 5,376 KB
testcase_57	AC	1 ms; 5,376 KB
testcase_58	AC	1 ms; 5,376 KB
testcase_59	AC	1 ms; 5,376 KB
testcase_60	AC	1 ms; 5,376 KB
testcase_61	AC	1 ms; 5,376 KB
testcase_62	AC	1 ms; 5,376 KB
testcase_63	AC	1 ms; 5,376 KB
testcase_64	AC	1 ms; 5,376 KB
testcase_65	AC	1 ms; 5,376 KB
testcase_66	AC	1 ms; 5,376 KB
testcase_67	AC	1 ms; 5,376 KB
testcase_68	AC	1 ms; 5,376 KB
testcase_69	AC	1 ms; 5,376 KB
testcase_70	AC	1 ms; 5,376 KB
testcase_71	AC	1 ms; 5,376 KB
testcase_72	AC	1 ms; 5,376 KB
testcase_73	AC	1 ms; 5,376 KB
testcase_74	AC	1 ms; 5,376 KB
testcase_75	AC	1 ms; 5,376 KB
testcase_76	AC	1 ms; 5,376 KB
testcase_77	AC	1 ms; 5,376 KB
testcase_78	AC	1 ms; 5,376 KB
testcase_79	AC	1 ms; 5,376 KB
testcase_80	AC	1 ms; 5,376 KB
testcase_81	AC	1 ms; 5,376 KB
testcase_82	AC	1 ms; 5,376 KB
testcase_83	AC	1 ms; 5,376 KB
testcase_84	AC	1 ms; 5,376 KB
testcase_85	AC	1 ms; 5,376 KB
testcase_86	AC	1 ms; 5,376 KB
testcase_87	AC	1 ms; 5,376 KB
testcase_88	AC	1 ms; 5,376 KB
testcase_89	AC	1 ms; 5,376 KB
testcase_90	AC	1 ms; 5,376 KB
testcase_91	AC	1 ms; 5,376 KB
testcase_92	AC	1 ms; 5,376 KB
testcase_93	AC	0 ms; 5,376 KB
testcase_94	AC	1 ms; 5,376 KB
testcase_95	AC	1 ms; 5,376 KB
testcase_96	AC	1 ms; 5,376 KB
testcase_97	AC	1 ms; 5,376 KB
testcase_98	AC	1 ms; 5,376 KB
testcase_99	AC	1 ms; 5,376 KB
testcase_100	AC	1 ms; 5,376 KB
testcase_101	AC	1 ms; 5,376 KB
testcase_102	AC	1 ms; 5,376 KB
testcase_103	AC	1 ms; 5,376 KB
testcase_104	AC	1 ms; 5,376 KB
testcase_105	AC	1 ms; 5,376 KB

コンパイルメッセージ

main.c: In function 'ins':
main.c:10:14: warning: implicit declaration of function 'getchar_unlocked' [-Wimplicit-function-declaration]
   10 | #define gc() getchar_unlocked()
      |              ^~~~~~~~~~~~~~~~
main.c:25:17: note: in expansion of macro 'gc'
   25 |         do *s = gc();
      |                 ^~
main.c: In function 'out':
main.c:11:15: warning: implicit declaration of function 'putchar_unlocked' [-Wimplicit-function-declaration]
   11 | #define pc(c) putchar_unlocked(c)
      |               ^~~~~~~~~~~~~~~~
main.c:35:17: note: in expansion of macro 'pc'
   35 |         if (!n) pc('0');
      |                 ^~

ソースコード

// yukicoder: No.491 10^9+1と回文
// 2019.6.27 bal4u

#include <stdio.h>
#include <string.h>

typedef long long ll;

#if 1
#define gc() getchar_unlocked()
#define pc(c) putchar_unlocked(c)
#else
#define gc() getchar()
#define pc(c) putchar(c)
#endif

ll in(char *s) {
	ll n = 0;
	while (*s) n = 10*n + (*s++ & 0xf);
	return n;
}

int ins(char *s) {
	char *p = s;
	do *s = gc();
	while (*s++ > ' ');
	*--s = 0;
	return s - p;
}

void out(int n) {
	int i;
	char ob[20];

	if (!n) pc('0');
	else {
		i = 0; while (n) ob[i++] = n%10 + '0', n/=10;
		while (i--) pc(ob[i]);
	}
	pc('\n');
}

//                              10 11  12  13   14   15    16    17     18
int a[20] = {0,0,0,0,0,0,0,0,0,0,9, 9, 90, 90, 900, 900, 9000, 9000, 90000, 90000};
int s[20] = {0,0,0,0,0,0,0,0,0,0,9,18,108,198,1098,1998,10998,19998,109998,199998};
char S[20], t[20]; int w;
int p10[10] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 };
ll N;

int cnt(char *t, int k) {
	int i, r = t[k] - '0' + (k > 0);
	i = k - 1;
	while (i >= 0) r += (t[i] - '0' - (i == 0)) * p10[k - i], i--;
	return r;
}

int main()
{
	int i, j, k, f;
	ll n;
	
	w = ins(S);
	if (w < 10) { out(0); return 0; }
	N = in(S);
	j = k = (w-9) >> 1, f = (w-9) & 1;
	memcpy(t, S, k); if (f) t[j++] = S[k];
	for (i = k-1; i >= 0; i--) t[j++] = t[i];
	while (j < w) t[j++] = '0'; t[j] = 0;
	memcpy(t+9, t, w-9);
	n = in(t);
	if (!f) k--;
	if (n > N) {
		i = k;
		while (1) {
			if (t[i] > '0') { t[i]--; break; }
			else t[i--] = '9';
		}
	}
	out(s[w-1] + cnt(t, k));
	return 0;
}