Submission #527556

#	Time	Username	Problem	Language	Result	Execution time	Memory
527556		rainboy	도로 건설 사업 (JOI13_construction)	C11	10 / 100	5048 ms	24728 KiB

construction

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

#define N	200000
#define K	200000
#define M	(N * 2)

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

unsigned int X = 12345;

int rand_() {
	return (X *= 3) >> 1;
}

int xx[N + K * 2], yy[N + K * 2], n, k;
int uu[M], vv[M], ww[M], m;

int compare_xy(int i, int j) {
	return xx[i] != xx[j] ? xx[i] - xx[j] : yy[i] - yy[j];
}

int compare_w(int h1, int h2) {
	return ww[h1] - ww[h2];
}

int (*compare)(int, int);

void sort(int *ii, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r, i_ = ii[l + rand_() % (r - l)], tmp;

		while (j < k) {
			int c = compare(ii[j], i_);

			if (c == 0)
				j++;
			else if (c < 0) {
				tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
			}
		}
		sort(ii, l, i);
		l = k;
	}
}

int ok(int x1, int x2, int y1, int y2) {
	int h;

	for (h = 0; h < k; h++) {
		int xl = max(xx[n + (h << 1 | 0)], x1), xr = min(xx[n + (h << 1 | 1)], x2);
		int yl = max(yy[n + (h << 1 | 0)], y1), yr = min(yy[n + (h << 1 | 1)], y2);

		if (xl <= xr && yl <= yr)
			return 0;
	}
	return 1;
}

int ds[N];

int find(int i) {
	return ds[i] < 0 ? i : (ds[i] = find(ds[i]));
}

int join(int i, int j) {
	i = find(i);
	j = find(j);
	if (i == j)
		return 0;
	if (ds[i] > ds[j])
		ds[i] = j;
	else {
		if (ds[i] == ds[j])
			ds[i]--;
		ds[j] = i;
	}
	return 1;
}

int main() {
	static int ii[N], hh[M];
	int m_, q, h, i, r, tmp;
	long long sum;

	scanf("%d%d%d", &n, &k, &q);
	for (i = 0; i < n + k * 2; i++)
		scanf("%d%d", &xx[i], &yy[i]);
	for (r = 0; r < 2; r++) {
		for (i = 0; i < n; i++)
			ii[i] = i;
		compare = compare_xy, sort(ii, 0, n);
		for (i = 0; i + 1 < n; i++)
			if (xx[ii[i]] == xx[ii[i + 1]] && ok(xx[ii[i]], xx[ii[i + 1]], yy[ii[i]], yy[ii[i + 1]]))
				uu[m] = ii[i], vv[m] = ii[i + 1], ww[m] = yy[ii[i + 1]] - yy[ii[i]], m++;
		for (i = 0; i < n + k * 2; i++)
			tmp = xx[i], xx[i] = yy[i], yy[i] = tmp;
	}
	for (h = 0; h < m; h++)
		hh[h] = h;
	compare = compare_w, sort(hh, 0, m);
	memset(ds, -1, n * sizeof *ds);
	m_ = 0, sum = 0;
	for (h = 0; h < m; h++)
		if (join(uu[hh[h]], vv[hh[h]]))
			hh[m_++] = hh[h], sum += ww[hh[h]];
	m = m_;
	while (q--) {
		int w, c;

		scanf("%d%d", &w, &c);
		if (c < n - m)
			printf("-1\n");
		else {
			long long ans;

			ans = sum + (long long) (n - m) * w;
			for (h = m - 1; h >= n - c && ww[hh[h]] > w; h--)
				ans -= ww[hh[h]] - w;
			printf("%lld\n", ans);
		}
	}
	return 0;
}

Compilation message (stderr)

construction.c: In function 'main':
construction.c:91:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |  scanf("%d%d%d", &n, &k, &q);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
construction.c:93:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |   scanf("%d%d", &xx[i], &yy[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
construction.c:116:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  116 |   scanf("%d%d", &w, &c);
      |   ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 30
• Subtask 3: 0 / 30
• Subtask 4: 0 / 30