Submission #381136

#	Time	Username	Problem	Language	Result	Execution time	Memory
381136		rainboy	New Home (APIO18_new_home)	C11	12 / 100	5035 ms	1048576 KiB

new_home

#include <stdio.h>

#define N	300000
#define Q	300000
#define M	(N * 2 + Q)
#define K	400
#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; }

unsigned int X = 12345;

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

int xx[N], tt[M], n;

int compare(int h1, int h2) {
	int type1, type2;

	if (tt[h1] != tt[h2])
		return tt[h1] - tt[h2];
	type1 = h1 < n * 2 ? ((h1 & 1) == 0 ? 1 : -1) : 0;
	type2 = h2 < n * 2 ? ((h2 & 1) == 0 ? 1 : -1) : 0;
	return type2 - type1;
}

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

		while (j < k) {
			int c = compare(hh[j], h);

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

int zz[1 + N], ll[1 + N], rr[1 + N], ii_[1 + N], u_, l_, r_;

int node(int i) {
	static int _ = 1;

	zz[_] = rand_();
	ii_[_] = i;
	return _++;
}

void split(int u, int i) {
	int c;

	if (u == 0) {
		u_ = l_ = r_ = 0;
		return;
	}
	c = xx[ii_[u]] != xx[i] ? xx[ii_[u]] - xx[i] : ii_[u] - i;
	if (c < 0) {
		split(rr[u], i);
		rr[u] = l_, l_ = u;
	} else if (c > 0) {
		split(ll[u], i);
		ll[u] = r_, r_ = u;
	} else {
		u_ = u, l_ = ll[u], r_ = rr[u];
		ll[u] = rr[u] = 0;
	}
}

int merge(int u, int v) {
	if (u == 0)
		return v;
	if (v == 0)
		return u;
	if (zz[u] < zz[v]) {
		rr[u] = merge(rr[u], v);
		return u;
	} else {
		ll[v] = merge(u, ll[v]);
		return v;
	}
}

int tr_update(int u, int i) {
	split(u, i);
	return merge(merge(l_, u_ == 0 ? node(i) : 0), r_);
}

int query(int u, int x) {
	int d;

	d = INF;
	while (u)
		if (xx[ii_[u]] < x)
			d = min(d, x - xx[ii_[u]]), u = rr[u];
		else
			d = min(d, xx[ii_[u]] - x), u = ll[u];
	return d;
}

int main() {
	static int gg[N], hh[M], xx_[Q], tr[K], ans[Q];
	int q, m, k, g, h, i;

	scanf("%d%d%d", &n, &k, &q);
	for (i = 0; i < n; i++)
		scanf("%d%d%d%d", &xx[i], &gg[i], &tt[i << 1 | 0], &tt[i << 1 | 1]), gg[i]--;
	for (h = 0; h < q; h++)
		scanf("%d%d", &xx_[h], &tt[n * 2 + h]);
	m = n * 2 + q;
	for (h = 0; h < m; h++)
		hh[h] = h;
	sort(hh, 0, m);
	for (h = 0; h < m; h++) {
		int h_ = hh[h];

		if (h_ >= n * 2) {
			h_ -= n * 2;
			for (g = 0; g < k; g++)
				ans[h_] = max(ans[h_], query(tr[g], xx_[h_]));
			if (ans[h_] == INF)
				ans[h_] = -1;
		} else {
			i = h_ >> 1;
			tr[gg[i]] = tr_update(tr[gg[i]], i);
		}
	}
	for (h = 0; h < q; h++)
		printf("%d\n", ans[h]);
	return 0;
}

Compilation message (stderr)

new_home.c: In function 'main':
new_home.c:117:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  117 |  scanf("%d%d%d", &n, &k, &q);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
new_home.c:119:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  119 |   scanf("%d%d%d%d", &xx[i], &gg[i], &tt[i << 1 | 0], &tt[i << 1 | 1]), gg[i]--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
new_home.c:121:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  121 |   scanf("%d%d", &xx_[h], &tt[n * 2 + h]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 0 / 10
• Subtask 4: 0 / 23
• Subtask 5: 0 / 35
• Subtask 6: 0 / 20