Submission #944566

#	Time	Username	Problem	Language	Result	Execution time	Memory
944566		rainboy	수족관 2 (KOI13_aqua2)	C11	100 / 100	89 ms	10068 KiB

aqua2

#include <stdio.h>

#define N	150000

double max(double a, double b) { return a > b ? a : b; }

int main() {
	static int xx[N + 1], yy[N], ll[N], rr[N], pp[N], qu[N], dd[N], kk[N];
	static double tt[N];
	int n, k, cnt, i, i_, p, lower, upper, x;
	long long area;

	scanf("%d%*d%*d", &n), n = n / 2 - 1;
	xx[0] = 0;
	for (i = 0; i < n; i++)
		scanf("%*d%*d%d%d", &xx[i + 1], &yy[i]);
	scanf("%*d%*d");
	cnt = 0;
	for (i = 0; i < n; i++) {
		while (cnt && yy[qu[cnt - 1]] > yy[i])
			cnt--;
		ll[i] = cnt == 0 ? -1 : qu[cnt - 1];
		qu[cnt++] = i;
	}
	cnt = 0;
	for (i = n - 1; i >= 0; i--) {
		while (cnt && yy[qu[cnt - 1]] >= yy[i])
			cnt--;
		rr[i] = cnt == 0 ? n : qu[cnt - 1];
		qu[cnt++] = i;
	}
	for (i = 0; i < n; i++) {
		pp[i] = rr[i] == n || ll[i] != -1 && yy[ll[i]] > yy[rr[i]] ? ll[i] : rr[i];
		if (pp[i] != -1)
			dd[pp[i]]++;
	}
	scanf("%d", &k);
	while (k--) {
		scanf("%d%*d%*d%*d", &x);
		lower = 0, upper = n;
		while (upper - lower > 1) {
			i = (lower + upper) / 2;
			if (xx[i] <= x)
				lower = i;
			else
				upper = i;
		}
		kk[lower]++;
	}
	for (i = 0; i < n; i++) {
		i_ = i;
		while (dd[i_] == 0) {
			p = pp[i_];
			if (kk[i_] > 0)
				tt[i_] += (double) (xx[rr[i_]] - xx[ll[i_] + 1]) * (yy[i_] - (p == -1 ? 0 : yy[p])) / kk[i_];
			dd[i_] = -1;
			if (p == -1)
				break;
			kk[p] += kk[i_], tt[p] = max(tt[p], tt[i_]), dd[p]--, i_ = p;
		}
	}
	for (i = 0; i < n; i++)
		if (pp[i] == -1) {
			printf("%.2f\n", tt[i]);
			break;
		}
	area = 0;
	for (i = 0; i < n; i++)
	 	if (kk[i] == 0)
			area += (long long) (xx[rr[i]] - xx[ll[i] + 1]) * (yy[i] - (pp[i] == -1 ? 0 : yy[pp[i]]));
	printf("%lld\n", area);
	return 0;
}

Compilation message (stderr)

aqua2.c: In function 'main':
aqua2.c:33:37: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   33 |   pp[i] = rr[i] == n || ll[i] != -1 && yy[ll[i]] > yy[rr[i]] ? ll[i] : rr[i];
      |                         ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
aqua2.c:13:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d%*d%*d", &n), n = n / 2 - 1;
      |  ^~~~~~~~~~~~~~~~~~~~~
aqua2.c:16:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |   scanf("%*d%*d%d%d", &xx[i + 1], &yy[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
aqua2.c:17:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |  scanf("%*d%*d");
      |  ^~~~~~~~~~~~~~~
aqua2.c:37:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |  scanf("%d", &k);
      |  ^~~~~~~~~~~~~~~
aqua2.c:39:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |   scanf("%d%*d%*d%*d", &x);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 21 / 21
• Subtask 3: 35 / 35
• Subtask 4: 31 / 31