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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#547229#3034. Antennascrimson231AC ✓484ms5984kbC++174.2kb2024-09-04 19:25:292024-09-04 19:25:30

Judging History

你现在查看的是最新测评结果

  • [2024-09-04 19:25:30]
  • 评测
  • 测评结果:AC
  • 用时:484ms
  • 内存:5984kb
  • [2024-09-04 19:25:29]
  • 提交

answer

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <cstring>
#include <cassert>
typedef long long ll;
//typedef long double ld;
typedef double ld;
const ld INF = 1e17;
const ld TOL = 1e-7;
const ld PI = acos(-1);
const int LEN = 50005;
inline int sign(const ll& x) { return x < 0 ? -1 : !!x; }
inline ll nC2(const ll& n) { return (n - 1) * n >> 1; }

int Z, N, M, Q;
struct Pos {
	int x, y;
	Pos(int X = 0, int Y = 0) : x(X), y(Y) {}
	bool operator == (const Pos& p) const { return x == p.x && y == p.y; }
	bool operator != (const Pos& p) const { return x != p.x || y != p.y; }
	bool operator < (const Pos& p) const { return x == p.x ? y < p.y : x < p.x; }
	Pos operator + (const Pos& p) const { return { x + p.x, y + p.y }; }
	Pos operator - (const Pos& p) const { return { x - p.x, y - p.y }; }
	ll operator * (const Pos& p) const { return (ll)x * p.x + (ll)y * p.y; }
	ll operator / (const Pos& p) const { return (ll)x * p.y - (ll)y * p.x; }
	Pos& operator += (const Pos& p) { x += p.x; y += p.y; return *this; }
	Pos& operator -= (const Pos& p) { x -= p.x; y -= p.y; return *this; }
	Pos& operator *= (const int& scale) { x *= scale; y *= scale; return *this; }
	Pos& operator /= (const int& scale) { x /= scale; y /= scale; return *this; }
	Pos operator - () const { return { -x, -y }; }
	ll Euc() const { return (ll)x * x + (ll)y * y; }
	friend std::istream& operator >> (std::istream& is, Pos& p) { is >> p.x >> p.y; return is; }
	friend std::ostream& operator << (std::ostream& os, const Pos& p) { os << p.x << " " << p.y; return os; }
}; const Pos O = Pos(0, 0);
typedef std::vector<Pos> Polygon;
ll cross(const Pos& d1, const Pos& d2, const Pos& d3) { return (d2 - d1) / (d3 - d2); }
int ccw(const Pos& d1, const Pos& d2, const Pos& d3) { return sign(cross(d1, d2, d3)); }
bool cmpt(const Pos& p, const Pos& q) { assert(p / q); return p / q ? p / q > 0 : p.Euc() < q.Euc(); }
ll conquer(Polygon& C, int l, int m, int r) {
	int i = l, j = m + 1, k = 0;
	Polygon tmp(r - l + 1);
	ll cnt = 0;
	while (i <= m && j <= r) {
		if (cmpt(C[i], C[j])) tmp[k++] = C[i++];
		else tmp[k++] = C[j++], cnt += ((ll)m + 1 - i);
	}
	while (i <= m) tmp[k++] = C[i++];
	while (j <= r) tmp[k++] = C[j++];
	for (i = l, k = 0; i <= r; i++, k++) C[i] = tmp[k];
	return cnt;
}
ll divide(Polygon& C, int l, int r) {
	if (l >= r) return 0;
	ll cnt = 0;
	int m = l + r >> 1;
	cnt += divide(C, l, m);
	cnt += divide(C, m + 1, r);
	cnt += conquer(C, l, m, r);
	return cnt;
}
ll merge_sort(Polygon& C) { return divide(C, 0, C.size() - 1); }
ll inv_count(Polygon& C, const Pos& a, const Pos& b) {
	int sz = C.size();
	ll all = nC2((ll)sz);
	for (int i = 0; i < sz; i++) C[i] -= a;
	std::sort(C.begin(), C.end(), cmpt);
	for (int i = 0; i < sz; i++) C[i] += a - b;
	ll ret = all - merge_sort(C);
	for (int i = 0; i < sz; i++) C[i] += b;
	return ret;
}
void query(const Polygon& H, const Polygon& A) {
	int a_, b_;
	std::cin >> a_ >> b_;
	int sz = H.size();
	Pos a0 = H[a_], a = H[(a_ + 1) % sz], b = H[b_], b0 = H[(b_ + 1) % sz];
	/*
	   a --- b         a == b      a - b
	   |     |   ||   / \      ||   \ /
	   a0 -- b0      a0 b0           a0 == b0
	*/
	Polygon ab, a0b, ab0;
	sz = A.size();
	for (int i = 0; i < sz; i++) {
		if (ccw(a0, b0, A[i]) >= 0) {
			if (ccw(b, a, A[i]) >= 0) ab.push_back(A[i]);
			if (ccw(b0, a, A[i]) >= 0) ab0.push_back(A[i]);
			if (ccw(b, a0, A[i]) >= 0) a0b.push_back(A[i]);
		}
		//if (ccw(a0, b0, A[i]) >= 0 && ccw(b, a, A[i]) >= 0) ab.push_back(A[i]);
		//if (ccw(a0, b0, A[i]) >= 0 && ccw(b0, a, A[i]) >= 0) ab0.push_back(A[i]);
		//if (ccw(a0, b0, A[i]) >= 0 && ccw(b, a0, A[i]) >= 0) a0b.push_back(A[i]);
	}
	ll ans = inv_count(ab, a, b) - inv_count(ab0, a, b0) - inv_count(a0b, a0, b);
	std::cout << ans << " ";
	return;
}
void query() {
	std::cin >> N; Polygon H(N);
	for (int i = 0; i < N; i++) std::cin >> H[i];
	std::cin >> M; Polygon A(M);
	for (int j = 0; j < M; j++) std::cin >> A[j];
	std::cin >> Q; while (Q--) query(H, A);
	std::cout << "\n";
	return;
}
void solve() {
	std::cin.tie(0)->sync_with_stdio(0);
	std::cout.tie(0);
	std::cin >> Z; while (Z--) query();
	return;
}
int main() { solve(); return 0; }//boj18051 Antennas


Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 276ms
memory: 3576kb

input:

116799

4
0 2
2 3
2 1
0 0
2
1 1
1 2
6
1 3
1 2
0 2
0 3
0 1
2 3

4
0 2
2 3
2 1
0 0
2
1 1
1 2
6
1 2
2 3
0 2
0 1
1 3
0 3

4
0 2
1 3
3 1
0 0
2
1 2
2 1
6
0 2
0 3
1 2
0 1
1 3
2 3

5
0 2
1 3
2 3
3 1
0 0
2
1 2
2 1
10
2 3
0 1
1 2
1 4
1 3
0 4
2 4
0 3
0 2
3 4

5
0 2
1 3
2 3
3 1
0 0
2
1 2
2 1
10
2 4
2 3
3 4
1 2
...

output:

0 0 1 0 0 0 
0 0 1 0 0 0 
1 0 0 0 0 0 
0 0 0 0 0 0 0 1 0 0 
0 0 0 0 1 0 0 0 0 0 
0 0 0 0 0 0 0 0 1 0 
0 0 0 0 1 0 0 0 0 0 
0 0 0 0 0 0 1 0 0 0 
0 0 0 0 0 0 0 0 1 0 
0 0 0 1 0 0 0 0 0 0 
0 0 0 1 0 0 
0 0 0 1 0 0 
1 0 0 0 0 0 
0 1 0 0 0 0 
0 0 0 0 1 0 
1 0 0 0 0 0 
0 0 0 0 1 0 
0 0 0 0 1 0 
0 0 0 0 0 ...

result:

ok 116799 lines

Test #2:

score: 0
Accepted
time: 411ms
memory: 5984kb

input:

6

3
-1000000000 -1000000000
-1000000000 1000000000
1000000000 -1000000000
50000
-157866428 -481268129
-943828535 -404551206
-702156200 -918976587
-930672851 -662946583
-701356764 -690150251
-125890933 -15199649
-454987413 -601182432
-796857455 -452853385
-364662709 -332922528
-446377184 -59908020
-...

output:

422781691 405698933 421494376 
90964408 112140449 58183510 0 86959753 401170255 0 83964813 77431438 36622679 
0 0 0 201707235 298189155 0 
20661817 1108613238 83335 103419782 17196828 0 
109534039 102221733 35500923 0 107684911 381431817 0 100815183 107832883 20782102 
28845692 14952512 28864912 378...

result:

ok 6 lines

Test #3:

score: 0
Accepted
time: 484ms
memory: 3500kb

input:

150000

10
128337801 981646274
680824665 718733451
973259647 181288879
893942524 -425401883
473169741 -869603585
-128337801 -981646274
-680824665 -718733451
-973259647 -181288879
-893942524 425401883
-473169741 869603585
2
0 900000000
0 -900000000
10
4 8
1 2
6 7
5 6
0 8
6 8
1 8
3 4
5 7
0 6

10
12833...

output:

0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 1 0 0 0 0 0 0 0 0 
0 1 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
1 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 1 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 ...

result:

ok 150000 lines