oj.uz

답안 #685202

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
685202 2023-01-23T16:59:13 Z rainboy Dragon 2 (JOI17_dragon2) C
100 / 100
 2573 ms 61988 KB 
#include <stdio.h>
#include <stdlib.h>

#define N	30000
#define N8	(N * 8)
#define LN	16	/* LN = ceil(log2(N * 2 + 1)) */
#define N_	(N8 * (LN + 1) + 1)

unsigned int X = 12345;

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

int *ei[N], *ei1[N], *ei2[N], *et1[N], *et2[N], eo[N], n, n_;
int xx[N + 2], yy[N + 2], cc[N], xx_[N], yy_[N], xx1[N8], yy1[N8];

void append(int c, int i) {
	int o = eo[c]++;

	if (o >= 2 && (o & o - 1) == 0)
		ei[c] = (int *) realloc(ei[c], o * 2 * sizeof *ei[c]);
	ei[c][o] = i;
}

long long cross2(int x1, int y1, int x2, int y2) {
	return (long long) x1 * y2 - (long long) x2 * y1;
}

long long cross(int i, int j, int k) {
	return cross2(xx[j] - xx[i], yy[j] - yy[i], xx[k] - xx[i], yy[k] - yy[i]);
}

int u;

int compare_c(int i, int j) {
	int si = xx[i] < xx[u] || xx[i] == xx[u] && yy[i] < yy[u] ? -1 : 1;
	int sj = xx[j] < xx[u] || xx[j] == xx[u] && yy[j] < yy[u] ? -1 : 1;
	long long c;

	if (si != sj)
		return si - sj;
	c = cross(u, i, j);
	return c == 0 ? 0 : (c < 0 ? -1 : 1);
}

int compare_x1(int i, int j) {
	return xx1[i] - xx1[j];
}

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 ll[N_], rr[N_], sum[N_];

int update(int t, int l, int r, int i, int x) {
	static int _ = 1;
	int t_ = _++;

	sum[t_] = sum[t] + x, ll[t_] = ll[t], rr[t_] = rr[t];
	if (r - l > 1) {
		int m = (l + r) / 2;

		if (i < m)
			ll[t_] = update(ll[t_], l, m, i, x);
		else
			rr[t_] = update(rr[t_], m, r, i, x);
	}
	return t_;
}

int query(int t, int l, int r, int ql, int qr) {
	int m;

	if (qr <= l || r <= ql)
		return 0;
	if (ql <= l && r <= qr)
		return sum[t];
	m = (l + r) / 2;
	return query(ll[t], l, m, ql, qr) + query(rr[t], m, r, ql, qr);
}

void add(int **ei, int a, int o, int i, int x, int y) {
	xx1[i] = x, yy1[i] = y, ei[a][o] = i;
}

int query_(int *ii, int *tt, int m, int x, int yl, int yr) {
	int lower = -1, upper = m;

	while (upper - lower > 1) {
		int h = (lower + upper) / 2;

		if (xx1[ii[h]] < x)
			lower = h;
		else
			upper = h;
	}
	return lower == -1 ? 0 : query(tt[lower], 0, n_, yl, yr);
}

int main() {
	static int ii[N], jj0[N], jj1[N];
	int m, q, i, j, a, b, c, o, ans;

	scanf("%d%d", &n, &m), n_ = n * 2 + 1;
	for (c = 0; c < m; c++) {
		ei[c] = (int *) malloc(2 * sizeof *ei[c]);
		ei1[c] = (int *) malloc(2 * sizeof *ei1[c]);
		ei2[c] = (int *) malloc(2 * sizeof *ei2[c]);
	}
	for (i = 0; i < n; i++) {
		scanf("%d%d%d", &xx[i], &yy[i], &cc[i]), cc[i]--;
		append(cc[i], i);
	}
	for (i = 0; i < n; i++)
		ii[i] = i;
	scanf("%d%d%d%d", &xx[n], &yy[n], &xx[n + 1], &yy[n + 1]);
	compare = compare_c, u = n, sort(ii, 0, n);
	for (i = 0; i < n; i++)
		xx_[ii[i]] = i;
	for (i = 0, j = 0; i < n; i++) {
		while (j < i + n && cross(u, ii[i], ii[j % n]) <= 0)
			j++;
		jj0[i] = j;
	}
	compare = compare_c, u = n + 1, sort(ii, 0, n);
	for (i = 0; i < n; i++)
		yy_[ii[i]] = i;
	for (i = 0, j = 0; i < n; i++) {
		while (j < i + n && cross(u, ii[i], ii[j % n]) <= 0)
			j++;
		jj1[i] = j;
	}
	for (a = 0; a < m; a++) {
		ei1[a] = (int *) malloc(eo[a] * 4 * sizeof *ei1[a]);
		ei2[a] = (int *) malloc(eo[a] * 4 * sizeof *ei2[a]);
		for (o = 0; o < eo[a]; o++) {
			i = ei[a][o];
			add(ei1, a, o << 2 | 0, i << 3 | 0, xx_[i], yy_[i]);
			add(ei1, a, o << 2 | 1, i << 3 | 1, xx_[i], yy_[i] + n);
			add(ei1, a, o << 2 | 2, i << 3 | 2, xx_[i] + n, yy_[i]);
			add(ei1, a, o << 2 | 3, i << 3 | 3, xx_[i] + n, yy_[i] + n);
			if (cross(i, n, n + 1) < 0) {
				add(ei2, a, o << 2 | 0, i << 3 | 4, jj0[xx_[i]], yy_[i]);
				add(ei2, a, o << 2 | 1, i << 3 | 5, jj0[xx_[i]], jj1[yy_[i]]);
				add(ei2, a, o << 2 | 2, i << 3 | 6, xx_[i] + n, yy_[i]);
				add(ei2, a, o << 2 | 3, i << 3 | 7, xx_[i] + n, jj1[yy_[i]]);
			} else {
				add(ei2, a, o << 2 | 0, i << 3 | 4, xx_[i], jj1[yy_[i]]);
				add(ei2, a, o << 2 | 1, i << 3 | 5, xx_[i], yy_[i] + n);
				add(ei2, a, o << 2 | 2, i << 3 | 6, jj0[xx_[i]], jj1[yy_[i]]);
				add(ei2, a, o << 2 | 3, i << 3 | 7, jj0[xx_[i]], yy_[i] + n);
			}
		}
		et1[a] = (int *) malloc(eo[a] * 4 * sizeof *et1[a]);
		compare = compare_x1, sort(ei1[a], 0, eo[a] * 4);
		for (o = 0; o < eo[a] * 4; o++) {
			i = ei1[a][o];
			et1[a][o] = update(o == 0 ? 0 : et1[a][o - 1], 0, n_, yy1[i], 1);
		}
		compare = compare_x1, sort(ei2[a], 0, eo[a] * 4);
		et2[a] = (int *) malloc(eo[a] * 4 * sizeof *et2[a]);
		for (o = 0; o < eo[a] * 4; o++) {
			i = ei2[a][o];
			et2[a][o] = update(o == 0 ? 0 : et2[a][o - 1], 0, n_, yy1[i], (i & 3) == 0 || (i & 3) == 3 ? 1 : -1);
		}
	}
	scanf("%d", &q);
	while (q--) {
		scanf("%d%d", &a, &b), a--, b--;
		ans = 0;
		if (eo[a] < eo[b] * 2)
			for (o = 0; o < eo[a]; o++) {
				i = ei[a][o];
				if (cross(i, n, n + 1) < 0)
					ans += query_(ei1[b], et1[b], eo[b] * 4, xx_[i] + n, yy_[i], jj1[yy_[i]]) - query_(ei1[b], et1[b], eo[b] * 4, jj0[xx_[i]], yy_[i], jj1[yy_[i]]);
				else
					ans += query_(ei1[b], et1[b], eo[b] * 4, jj0[xx_[i]], jj1[yy_[i]], yy_[i] + n) - query_(ei1[b], et1[b], eo[b] * 4, xx_[i], jj1[yy_[i]], yy_[i] + n);
			}
		else
			for (o = 0; o < eo[b]; o++) {
				i = ei[b][o];
				ans += query_(ei2[a], et2[a], eo[a] * 4, xx_[i] + 1, 0, yy_[i] + 1);
				ans += query_(ei2[a], et2[a], eo[a] * 4, xx_[i] + 1, 0, yy_[i] + n + 1);
				ans += query_(ei2[a], et2[a], eo[a] * 4, xx_[i] + n + 1, 0, yy_[i] + 1);
				ans += query_(ei2[a], et2[a], eo[a] * 4, xx_[i] + n + 1, 0, yy_[i] + n + 1);
			}
		printf("%d\n", ans);
	}
	return 0;
}

Compilation message

dragon2.c: In function 'append':
dragon2.c:21:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   21 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
dragon2.c: In function 'compare_c':
dragon2.c:37:43: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   37 |  int si = xx[i] < xx[u] || xx[i] == xx[u] && yy[i] < yy[u] ? -1 : 1;
      |                            ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
dragon2.c:38:43: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   38 |  int sj = xx[j] < xx[u] || xx[j] == xx[u] && yy[j] < yy[u] ? -1 : 1;
      |                            ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
dragon2.c: In function 'main':
dragon2.c:126:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  126 |  scanf("%d%d", &n, &m), n_ = n * 2 + 1;
      |  ^~~~~~~~~~~~~~~~~~~~~
dragon2.c:133:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  133 |   scanf("%d%d%d", &xx[i], &yy[i], &cc[i]), cc[i]--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.c:138:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  138 |  scanf("%d%d%d%d", &xx[n], &yy[n], &xx[n + 1], &yy[n + 1]);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.c:189:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  189 |  scanf("%d", &q);
      |  ^~~~~~~~~~~~~~~
dragon2.c:191:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  191 |   scanf("%d%d", &a, &b), a--, b--;
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 4692 KB Output is correct
2 Correct 17 ms 4736 KB Output is correct
3 Correct 76 ms 4812 KB Output is correct
4 Correct 150 ms 5084 KB Output is correct
5 Correct 67 ms 5520 KB Output is correct
6 Correct 8 ms 5204 KB Output is correct
7 Correct 8 ms 5204 KB Output is correct
8 Correct 9 ms 4564 KB Output is correct
9 Correct 8 ms 4564 KB Output is correct
10 Correct 8 ms 4592 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 151 ms 52836 KB Output is correct
2 Correct 283 ms 52880 KB Output is correct
3 Correct 128 ms 52936 KB Output is correct
4 Correct 96 ms 52968 KB Output is correct
5 Correct 94 ms 59272 KB Output is correct
6 Correct 134 ms 52280 KB Output is correct
7 Correct 123 ms 52144 KB Output is correct
8 Correct 118 ms 52136 KB Output is correct
9 Correct 91 ms 52120 KB Output is correct
10 Correct 94 ms 52696 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 4692 KB Output is correct
2 Correct 17 ms 4736 KB Output is correct
3 Correct 76 ms 4812 KB Output is correct
4 Correct 150 ms 5084 KB Output is correct
5 Correct 67 ms 5520 KB Output is correct
6 Correct 8 ms 5204 KB Output is correct
7 Correct 8 ms 5204 KB Output is correct
8 Correct 9 ms 4564 KB Output is correct
9 Correct 8 ms 4564 KB Output is correct
10 Correct 8 ms 4592 KB Output is correct
11 Correct 151 ms 52836 KB Output is correct
12 Correct 283 ms 52880 KB Output is correct
13 Correct 128 ms 52936 KB Output is correct
14 Correct 96 ms 52968 KB Output is correct
15 Correct 94 ms 59272 KB Output is correct
16 Correct 134 ms 52280 KB Output is correct
17 Correct 123 ms 52144 KB Output is correct
18 Correct 118 ms 52136 KB Output is correct
19 Correct 91 ms 52120 KB Output is correct
20 Correct 94 ms 52696 KB Output is correct
21 Correct 139 ms 53484 KB Output is correct
22 Correct 292 ms 53520 KB Output is correct
23 Correct 1554 ms 53672 KB Output is correct
24 Correct 2573 ms 54956 KB Output is correct
25 Correct 341 ms 56640 KB Output is correct
26 Correct 181 ms 61288 KB Output is correct
27 Correct 104 ms 58828 KB Output is correct
28 Correct 105 ms 58936 KB Output is correct
29 Correct 228 ms 61692 KB Output is correct
30 Correct 155 ms 61568 KB Output is correct
31 Correct 158 ms 61988 KB Output is correct
32 Correct 182 ms 61640 KB Output is correct
33 Correct 1227 ms 61712 KB Output is correct
34 Correct 158 ms 61832 KB Output is correct
35 Correct 151 ms 61124 KB Output is correct
36 Correct 168 ms 61168 KB Output is correct
37 Correct 182 ms 61372 KB Output is correct
38 Correct 1231 ms 61872 KB Output is correct
39 Correct 1452 ms 61740 KB Output is correct
40 Correct 1421 ms 61808 KB Output is correct
41 Correct 286 ms 61604 KB Output is correct
42 Correct 293 ms 61720 KB Output is correct
43 Correct 366 ms 61684 KB Output is correct
44 Correct 147 ms 57092 KB Output is correct
45 Correct 150 ms 56896 KB Output is correct
46 Correct 152 ms 57016 KB Output is correct
47 Correct 139 ms 56896 KB Output is correct
48 Correct 142 ms 56884 KB Output is correct
49 Correct 140 ms 56844 KB Output is correct