Submission #683592

#	Time	Username	Problem	Language	Result	Execution time	Memory
683592		rainboy	Arranging Tickets (JOI17_arranging_tickets)	C11	10 / 100	172 ms	316 KiB

arranging_tickets

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

#define N	100000
#define M	200000
#define INF	0x3f3f3f3f

int min(int a, int b) { return a < b ? a : b; }
int max(int a, int b) { return a > b ? a : b; }

int main() {
	static int xx[N], yy[N], cc[N], dd[M];
	int n, m, i, b, a, tmp, ans, x;

	scanf("%d%d", &m, &n);
	for (i = 0; i < n; i++) {
		scanf("%d%d%d", &xx[i], &yy[i], &cc[i]), xx[i]--, yy[i]--;
		if (xx[i] > yy[i])
			tmp = xx[i], xx[i] = yy[i], yy[i] = tmp;
	}
	ans = INF;
	for (b = 0; b < 1 << n; b++) {
		memset(dd, 0, m * sizeof *dd);
		for (i = 0; i < n; i++)
			if ((b & 1 << i) == 0)
				dd[xx[i]]++, dd[yy[i]]--;
			else
				dd[0]++, dd[xx[i]]--, dd[yy[i]]++;
		for (a = 1; a < m; a++)
			dd[a] += dd[a - 1];
		x = 0;
		for (a = 0; a < m; a++)
			x = max(x, dd[a]);
		ans = min(ans, x);
	}
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

arranging_tickets.c: In function 'main':
arranging_tickets.c:15:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  scanf("%d%d", &m, &n);
      |  ^~~~~~~~~~~~~~~~~~~~~
arranging_tickets.c:17:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   scanf("%d%d%d", &xx[i], &yy[i], &cc[i]), xx[i]--, yy[i]--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 35
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 15