Submission #485386

#	Time	Username	Problem	Language	Result	Execution time	Memory
485386		rainboy	Kosta (COI14_kosta)	C11	20 / 100	89 ms	4520 KiB

kosta

#include <stdio.h>

#define N1	200000
#define N2	50000
#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 xx[N1], yy[N1], n;

int t, u;

int check(int d) {
	int i, xmn, xmx, ymn, ymx;

	xmn = INF, xmx = -INF, ymn = INF, ymx = -INF;
	for (i = 0; i < n; i++) {
		xmn = min(xmn, xx[i]), xmx = max(xmx, xx[i]);
		ymn = min(ymn, yy[i]), ymx = max(ymx, yy[i]);
	}
	u = -1;
	for (i = 0; i < n; i++)
		if (xx[i] - xmn <= d && xmx - xx[i] <= d && yy[i] - ymn <= d && ymx - yy[i] <= d) {
			u = i;
			return 1;
		}
	return 0;
}

int main() {
	int i, lower, upper;

	scanf("%d%d", &t, &n);
	for (i = 0; i < n; i++) {
		int x, y;

		scanf("%d%d", &x, &y);
		xx[i] = x + y, yy[i] = x - y;
	}
	lower = -1, upper = INF;
	while (upper - lower > 1) {
		int d = (lower + upper) / 2;

		if (check(d))
			upper = d;
		else
			lower = d;
	}
	check(upper);
	printf("%d\n", upper);
	printf("%d\n", u + 1);
	return 0;
}

Compilation message (stderr)

kosta.c: In function 'main':
kosta.c:34:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |  scanf("%d%d", &t, &n);
      |  ^~~~~~~~~~~~~~~~~~~~~
kosta.c:38:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |   scanf("%d%d", &x, &y);
      |   ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 2 / 2
• Subtask 3: 8 / 8
• Subtask 4: 8 / 8
• Subtask 5: 0 / 2
• Subtask 6: 0 / 2
• Subtask 7: 0 / 12
• Subtask 8: 0 / 12
• Subtask 9: 0 / 26
• Subtask 10: 0 / 26