제출 #382581

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
382581		rainboy	가로등 (APIO19_street_lamps)	C11	20 / 100	1 ms	364 KiB

street_lamps

#include <stdio.h>

#define N	300000
#define Q	300000
#define S	100

int main() {
	static char cc[N + 1];
	static int ll[S][S];
	int n, q, h, h_, i;

	scanf("%d%d%s", &n, &q, cc);
	if (n <= 100 && q <= 100) {
		for (h = 0; h < q; h++) {
			static char s[8];

			scanf("%s", s);
			for (i = 0; i < n; i++)
				ll[h][i] = cc[i] == '0' ? i + 1 : (i == 0 ? 0 : ll[h][i - 1]);
			if (s[0] == 't') {
				scanf("%d", &i), i--;
				cc[i] = (cc[i] - '0' ^ 1) + '0';
			} else {
				int l, r, cnt;

				scanf("%d%d", &l, &r), l--, r -= 2;
				cnt = 0;
				for (h_ = 0; h_ <= h; h_++)
					if (ll[h_][r] <= l)
						cnt++;
				printf("%d\n", cnt);
			}
		}
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

street_lamps.c: In function 'main':
street_lamps.c:22:20: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   22 |     cc[i] = (cc[i] - '0' ^ 1) + '0';
      |              ~~~~~~^~~~~
street_lamps.c:12:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   12 |  scanf("%d%d%s", &n, &q, cc);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.c:17:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   17 |    scanf("%s", s);
      |    ^~~~~~~~~~~~~~
street_lamps.c:21:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   21 |     scanf("%d", &i), i--;
      |     ^~~~~~~~~~~~~~~
street_lamps.c:26:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   26 |     scanf("%d%d", &l, &r), l--, r -= 2;
      |     ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20