oj.uz

답안 #466746

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
466746 2021-08-20T15:37:02 Z rainboy 육각형 영역 (APIO21_hexagon) C++17
66 / 100
 777 ms 33296 KB 
#include "hexagon.h"
#include <stdlib.h>
#include <vector>
 
using namespace std;
 
typedef vector<int> vi;
 
const int N = 200000, MD = 1000000007, V2 = 500000004, V6 = 166666668;
 
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 dx[] = { 1, 1, 0, -1, -1, 0 };
int dy[] = { 0, 1, 1, 0, -1, -1 };
 
int choose2(int n) {
	return (long long) n * (n - 1) % MD * V2 % MD;
}
 
int choose3(int n) {
	return (long long) n * (n - 1) % MD * (n - 2) % MD * V6 % MD;
}
 
long long cross(int x1, int y1, int x2, int y2) {
	return (long long) x1 * y2 - (long long) x2 * y1;
}
 
int hh[N], ll[N], ii[N], xx[N][2], yy[N], n, n_;
 
void add(long long x1, long long y1, long long x2, long long y2) {
	if (y1 < y2)
		xx[n_][0] = x1, xx[n_][1] = x2, yy[n_] = y1, n_++;
	else if (y1 > y2)
		xx[n_][0] = x2, xx[n_][1] = x1, yy[n_] = y2, n_++;
}
 
int compare(int i, int j) {
	int c = yy[i] != yy[j] ? yy[i] - yy[j] : (xx[i][0] + xx[i][1]) - (xx[j][0] + xx[j][1]);
 
	return c == 0 ? 0 : (c < 0 ? -1 : 1);
}
 
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 *ej[N], eo[N];
 
void append(int i, int j) {
	int o = eo[i]++;
 
	if (o >= 2 && (o & o - 1) == 0)
		ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
	ej[i][o] = j;
}
 
int area(int xi1, int xi2, int xj1, int xj2, int z, int l) {
	int d = ((xj2 - xj1) - (xi2 - xi1)) / l, h, ans;
 
	ans = 0;
	for (h = 1; h < l; h++)
		ans = (ans + (long long) (xi2 - xi1 + 1 + d * h) * (z + h)) % MD;
	return ans;
}
 
int dfs(int p, int i, int d, int l) {
	int i_, s, xi1, xi2, o, x;
 
	i_ = i >> 1, s = i & 1, xi1 = xx[ii[i_ << 1 | 0]][s], xi2 = xx[ii[i_ << 1 | 1]][s];
	x = (long long) d * (xi2 - xi1 + 1) % MD;
	for (o = eo[i]; o--; ) {
		int j = ej[i][o];
 
		if (j != p) {
			int j_ = j >> 1, t = j & 1, xj1 = xx[ii[j_ << 1 | 0]][t], xj2 = xx[ii[j_ << 1 | 1]][t];
 
			if ((i ^ j) == 1)
				x = (x + dfs(i, j, d + l, l) + area(xi1, xi2, xj1, xj2, d, l)) % MD; 
			else {
				x = (x + dfs(i, j, d, l)) % MD;
				x = (x - (long long) d * (min(xi2, xj2) - max(xi1, xj1) + 1)) % MD;
			}
		}
	}
	return x;
}
 
int solve() {
	int l_, h, i, j, k, l, x, y, ans;
 
	l_ = ll[0];
	for (i = 0; i < n; i++)
		if (ll[i] != ll[0]) {
			l_ = 1;
			break;
		}
	l_ = 1;
	if (l_ == 1) {
		n_ = 0, x = 0, y = 0;
		for (i = 0; i < n; i++)
			for (l = 0; l < ll[i]; l++)
				add(x, y, x + dx[hh[i]], y + dy[hh[i]]), x += dx[hh[i]], y += dy[hh[i]];
	} else {
		n_ = 0, x = 0, y = 0;
		for (i = 0; i < n; i++)
			add(x, y, x + dx[hh[i]] * l_, y + dy[hh[i]] * l_), x += dx[hh[i]] * l_, y += dy[hh[i]] * l_;
	}
	for (i = 0; i < n_; i++)
		ii[i] = i;
	sort(ii, 0, n_);
	n_ /= 2;
	for (i = 0; i < n_ * 2; i++)
		ej[i] = (int *) malloc(2 * sizeof *ej[i]), eo[i] = 0;
	for (i = 0; i < n_; i++)
		append(i << 1 | 0, i << 1 | 1), append(i << 1 | 1, i << 1 | 0);
	for (h = -1, i = 0; i < n_; h = i, i = j) {
		int y = yy[ii[i << 1 | 0]];
 
		j = i + 1;
		while (j < n_ && yy[ii[j << 1 | 0]] == y)
			j++;
		if (h != -1) {
			k = h, l = i;
			while (k < i && l < j)
				if (xx[ii[k << 1 | 1]][1] < xx[ii[l << 1 | 1]][0]) {
					if (xx[ii[l << 1 | 0]][0] <= xx[ii[k << 1 | 1]][1])
						append(k << 1 | 1, l << 1 | 0), append(l << 1 | 0, k << 1 | 1);
					k++;
				} else {
					if (xx[ii[k << 1 | 0]][1] <= xx[ii[l << 1 | 1]][0])
						append(k << 1 | 1, l << 1 | 0), append(l << 1 | 0, k << 1 | 1);
					l++;
				}
		}
	}
	ans = 0;
	for (i = 0; i < n_; i++) {
		int i0 = ii[i << 1 | 0], i1 = ii[i << 1 | 1];
 
		if (yy[i0] == 0 && xx[i0][0] <= 0 && 0 <= xx[i1][0]) {
			ans = dfs(-1, i << 1 | 0, 0, l_);
			for (i = 0; i < n_ * 2; i++)
				free(ej[i]);
			break;
		}
		if (yy[i1] + 1 == 0 && xx[i0][1] <= 0 && 0 <= xx[i1][1]) {
			ans = dfs(-1, i << 1 | 1, 0, l_);
			for (i = 0; i < n_ * 2; i++)
				free(ej[i]);
			break;
		}
	}
	return ans;
}
 
int draw_territory(int n_, int a, int b, vi hh_, vi ll_) {
	int h, i, x, y, ans1, ans2;
	long long area2, boundary, internal;
 
	n = n_;
	for (i = 0; i < n; i++)
		hh[i] = hh_[i] - 1, ll[i] = ll_[i];
	x = 0, y = 0, area2 = 0, boundary = 0;
	for (i = 0; i < n; i++) {
		h = hh[i];
		area2 += cross(x, y, x + dx[h] * ll[i], y + dy[h] * ll[i]);
		boundary += ll[i];
		x += dx[h] * ll[i], y += dy[h] * ll[i];
	}
	if (area2 < 0)
		area2 = -area2;
	internal = (area2 - boundary) / 2 + 1;
	ans1 = (boundary + internal) % MD, ans2 = 0;
	if (n == 3)
		ans2 = choose3(ll[0] + 2) * 2 % MD;
	else if (b > 0) {
		ans2 = 0;
		for (h = 0; h < 3; h++) {
			ans2 = (ans2 + solve()) % MD;
			for (i = 0; i < n; i++)
				hh[i] = (hh[i] + 1) % 6;
		}
		if (ans2 < 0)
			ans2 += MD;
		ans2 = (long long) ans2 * V2 % MD;
	}
	return ((long long) ans1 * a + (long long) ans2 * b) % MD;
}

Compilation message

hexagon.cpp: In function 'void append(int, int)':
hexagon.cpp:77:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   77 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 1 ms 588 KB Output is correct
17 Correct 1 ms 588 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct

Subtask #4
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 3 ms 460 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 2 ms 332 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 6 ms 972 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 10 ms 1356 KB Output is correct
12 Correct 10 ms 1484 KB Output is correct
13 Correct 9 ms 1304 KB Output is correct
14 Correct 10 ms 1468 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct

Subtask #5
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 2 ms 460 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 6 ms 1048 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 9 ms 1448 KB Output is correct
14 Correct 9 ms 1484 KB Output is correct
15 Correct 9 ms 1356 KB Output is correct
16 Correct 12 ms 1476 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 16 ms 2068 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 21 ms 2756 KB Output is correct
24 Correct 34 ms 4284 KB Output is correct
25 Correct 46 ms 4536 KB Output is correct
26 Correct 17 ms 2380 KB Output is correct
27 Correct 12 ms 1688 KB Output is correct
28 Correct 9 ms 1228 KB Output is correct
29 Correct 50 ms 4932 KB Output is correct
30 Correct 39 ms 4928 KB Output is correct
31 Correct 39 ms 4920 KB Output is correct
32 Correct 38 ms 4932 KB Output is correct
33 Correct 23 ms 2476 KB Output is correct
34 Correct 10 ms 1312 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 0 ms 204 KB Output is correct

Subtask #6
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 1 ms 588 KB Output is correct
17 Correct 1 ms 588 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 9 ms 972 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 9 ms 1444 KB Output is correct
29 Correct 9 ms 1484 KB Output is correct
30 Correct 9 ms 1300 KB Output is correct
31 Correct 10 ms 1472 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 43 ms 10840 KB Output is correct
35 Correct 50 ms 5804 KB Output is correct
36 Correct 45 ms 6132 KB Output is correct
37 Correct 79 ms 9796 KB Output is correct
38 Correct 88 ms 9664 KB Output is correct
39 Correct 87 ms 11588 KB Output is correct
40 Correct 85 ms 11272 KB Output is correct
41 Correct 140 ms 22512 KB Output is correct
42 Correct 131 ms 18628 KB Output is correct
43 Correct 122 ms 16056 KB Output is correct
44 Correct 89 ms 20556 KB Output is correct
45 Correct 77 ms 17348 KB Output is correct
46 Correct 75 ms 17044 KB Output is correct
47 Correct 127 ms 22668 KB Output is correct
48 Correct 149 ms 28612 KB Output is correct
49 Correct 141 ms 33296 KB Output is correct
50 Correct 0 ms 204 KB Output is correct
51 Correct 0 ms 204 KB Output is correct
52 Correct 0 ms 204 KB Output is correct
53 Correct 0 ms 204 KB Output is correct
54 Correct 1 ms 204 KB Output is correct
55 Correct 0 ms 204 KB Output is correct
56 Correct 0 ms 204 KB Output is correct
57 Correct 0 ms 204 KB Output is correct

Subtask #7
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Runtime error 777 ms 8264 KB Execution killed with signal 11
6 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 2 ms 460 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 460 KB Output is correct
19 Correct 1 ms 460 KB Output is correct
20 Correct 1 ms 588 KB Output is correct
21 Correct 1 ms 588 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 2 ms 460 KB Output is correct
28 Correct 8 ms 972 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 10 ms 1356 KB Output is correct
33 Correct 13 ms 1456 KB Output is correct
34 Correct 11 ms 1356 KB Output is correct
35 Correct 10 ms 1540 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 1 ms 204 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 16 ms 2124 KB Output is correct
40 Correct 2 ms 460 KB Output is correct
41 Correct 1 ms 332 KB Output is correct
42 Correct 22 ms 2724 KB Output is correct
43 Correct 33 ms 4300 KB Output is correct
44 Correct 36 ms 4548 KB Output is correct
45 Correct 19 ms 2412 KB Output is correct
46 Correct 13 ms 1688 KB Output is correct
47 Correct 11 ms 1228 KB Output is correct
48 Correct 39 ms 4928 KB Output is correct
49 Correct 38 ms 4932 KB Output is correct
50 Correct 38 ms 4932 KB Output is correct
51 Correct 38 ms 4908 KB Output is correct
52 Correct 18 ms 2508 KB Output is correct
53 Correct 9 ms 1316 KB Output is correct
54 Correct 44 ms 10792 KB Output is correct
55 Correct 64 ms 5748 KB Output is correct
56 Correct 52 ms 6212 KB Output is correct
57 Correct 76 ms 9864 KB Output is correct
58 Correct 84 ms 9852 KB Output is correct
59 Correct 87 ms 11504 KB Output is correct
60 Correct 88 ms 11460 KB Output is correct
61 Correct 152 ms 22560 KB Output is correct
62 Correct 132 ms 18616 KB Output is correct
63 Correct 129 ms 16068 KB Output is correct
64 Correct 98 ms 20728 KB Output is correct
65 Correct 80 ms 17532 KB Output is correct
66 Correct 76 ms 17268 KB Output is correct
67 Correct 123 ms 22836 KB Output is correct
68 Correct 148 ms 28668 KB Output is correct
69 Correct 145 ms 33220 KB Output is correct
70 Runtime error 692 ms 8272 KB Execution killed with signal 11
71 Halted 0 ms 0 KB -