oj.uz

Submission #544784

# Submission time Handle Problem Language Result Execution time Memory
544784 2022-04-02T16:44:53 Z rainboy Hotel (CEOI11_hot) C
100 / 100
 646 ms 37220 KB 
#include <stdio.h>

#define N	500000
#define M	500000

unsigned int X = 12345;

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

int *xx, *yy;

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 = xx[ii[j]] != xx[i_] ? xx[ii[j]] - xx[i_] : yy[ii[j]] - yy[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 dd[M], iq[1 + M], pq[M], cnt;

int lt(int i, int j) {
	return dd[i] > dd[j];
}

int p2(int p) {
	return (p *= 2) > cnt ? 0 : (lt(iq[p + 1], iq[p]) ? p + 1 : p);
}

void pq_up(int i) {
	int p, q, j;

	for (p = pq[i]; (q = p / 2) && lt(i, j = iq[q]); p = q)
		iq[pq[j] = p] = j;
	iq[pq[i] = p] = i;
}

void pq_dn(int i) {
	int p, q, j;

	for (p = pq[i]; (q = p2(p)) && lt(j = iq[q], i); p = q)
		iq[pq[j] = p] = j;
	iq[pq[i] = p] = i;
}

void pq_add(int i) {
	pq[i] = ++cnt, pq_up(i);
}

int pq_remove_first() {
	int i = iq[1], j = iq[cnt--];

	if (j != i)
		pq[j] = 1, pq_dn(j);
	pq[i] = 0;
	return i;
}

int main() {
	static int aa[N], bb[N], cc[M], ee[N], hh[N], ii[N], jj[M];
	int n, m, k_, k, h, i, j;
	long long ans;

	scanf("%d%d%d", &n, &m, &k);
	for (i = 0; i < n; i++) {
		scanf("%d%d", &bb[i], &aa[i]);
		ii[i] = i;
	}
	xx = aa, yy = bb, sort(ii, 0, n);
	for (j = 0; j < m; j++) {
		scanf("%d%d", &dd[j], &cc[j]);
		jj[j] = j;
	}
	xx = cc, yy = dd, sort(jj, 0, m);
	k_ = 0;
	for (i = 0, j = 0; i < n; i++) {
		while (j < m && cc[jj[j]] <= aa[ii[i]])
			pq_add(jj[j++]);
		if (cnt)
			ee[k_++] = dd[pq_remove_first()] - bb[ii[i]];
	}
	for (h = 0; h < k_; h++)
		hh[h] = h;
	xx = ee, yy = ee, sort(hh, 0, k_);
	ans = 0;
	for (h = k_ - 1; h >= 0 && ee[hh[h]] > 0 && h >= k_ - k; h--)
		ans += ee[hh[h]];
	printf("%lld\n", ans);
	return 0;
}

Compilation message

hot.c: In function 'main':
hot.c:80:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |  scanf("%d%d%d", &n, &m, &k);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
hot.c:82:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |   scanf("%d%d", &bb[i], &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hot.c:87:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   87 |   scanf("%d%d", &dd[j], &cc[j]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 280 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 288 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 816 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 3352 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 5484 KB Output is correct
2 Correct 54 ms 3692 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 221 ms 15008 KB Output is correct
2 Correct 179 ms 9008 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 489 ms 29760 KB Output is correct
2 Correct 470 ms 29796 KB Output is correct

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 635 ms 33988 KB Output is correct
2 Correct 646 ms 37220 KB Output is correct
3 Correct 604 ms 34368 KB Output is correct