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답안 #467709

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
467709 2021-08-24T07:05:07 Z pure_mem Dragon 2 (JOI17_dragon2) C++14
60 / 100
 4000 ms 13656 KB 
#include <bits/stdc++.h>

#define X first
#define Y second
#define MP make_pair
#define ll long long

using namespace std;

const int maxN = 6e4 + 12;
const int maxQ = 1e5 + 12;
const int block = 300, INF = 1e9 + 7;

typedef pair<ll, ll> Point;
Point origin;

struct Fenwick {
	int f[maxN], was[maxN], timer = 0;
	void clear() {
		timer++;
	}
	void upd(int v, int val) {
		for(;v < maxN;v |= v + 1) {
			if(was[v] != timer)
				f[v] = 0, was[v] = timer;
			f[v] += val;
	    }
	}
	int get(int v) {
		int res = 0;
		for(;v >= 0;v = (v & (v + 1)) - 1) {
			if(was[v] != timer)
				f[v] = 0, was[v] = timer;
			res += f[v];
		}
		return res;
	}
	int get(int l, int r) {
		if(l > r) {
			return get(maxN - 1) - get(l - 1) + get(r);
		} 
		else {
		    return get(r) - get(l - 1);
		}
	}
} BIT;

int sign(ll value) {
	if(value > 0) return 1;
	if(value < 0) return -1;
	return 0;
}

int half(Point a, Point b) {
	if(a.X != b.X) 
		return a.X < b.X ? 1: -1;
	return a.Y < b.Y ? 1: -1;
}

ll cross(Point a, Point b, Point c) {
	a.X -= c.X, b.X -= c.X;
	a.Y -= c.Y, b.Y -= c.Y;
	return a.X * b.Y - a.Y * b.X;
}

struct Event {
	int clr, id;
	Point pos;
};

bool operator < (const Event &lhs, const Event &rhs) {
	int lhs_h = half(lhs.pos, origin);
	int rhs_h = half(rhs.pos, origin);
	if(lhs_h != rhs_h)
		return lhs_h < rhs_h;
	return cross(lhs.pos, rhs.pos, origin) < 0;
}

int n, m, q, tValue[maxN], txValue[maxN];
ll answer[maxQ];
pair< Point, Point > city;
pair< int, int > border[maxN], xBorder[maxN];
vector< pair<int, int> > rQuery[maxN], Query[maxN];
vector< int > gDragon[maxN];
Event dragon[maxN];

// border - y, area - x

void inputs() {
	memset(answer, -1, sizeof(answer));
	cin >> n >> m;
	for(int i = 1, x, y, clr;i <= n;i++){
		cin >> x >> y >> clr;
	//	x += INF, y += INF;
		dragon[i] = {clr, i, {x, y}};
		dragon[i + n] = {-clr, i, {-x, -y}};		
	}
	cin >> city.X.X >> city.X.Y >> city.Y.X >> city.Y.Y;
	cin >> q;
	for(int i = 1, u, v;i <= q;i++){
		cin >> u >> v;
		Query[u].push_back({v, i});
		rQuery[v].push_back({u, i});
	}
}

void normalize() {
	for(int i = 1;i <= n + n;i++) {
		if(dragon[i].clr > 0) {
			dragon[i].pos.X -= origin.X;	
			dragon[i].pos.Y -= origin.Y;
		}	
		else {
		    dragon[i].pos.X += origin.X;	
			dragon[i].pos.Y += origin.Y;
		}
	}
	city.X.X -= origin.X, city.Y.X -= origin.X;
	city.X.Y -= origin.Y, city.Y.Y -= origin.Y;
}
void d_normalize() {
	for(int i = 1;i <= n + n;i++) {
		if(dragon[i].clr > 0) {
			dragon[i].pos.X += origin.X;	
			dragon[i].pos.Y += origin.Y;
		}	
		else {
		    dragon[i].pos.X -= origin.X;	
			dragon[i].pos.Y -= origin.Y;
		}
	}
	city.X.X += origin.X, city.Y.X += origin.X;
	city.X.Y += origin.Y, city.Y.Y += origin.Y;
}

void prepare() {
	origin = city.Y;
	auto mem = origin;
	normalize(), origin = MP(0, 0);
	sort(dragon + 1, dragon + n + n + 1);
	for(int i = 1, id;i <= n + n;i++){
		id = dragon[i].id;
		if(dragon[i].clr > 0)
			tValue[id] = i;
		if(border[id].X == 0)	
			border[id].X = i;
		else
			border[id].Y = i;	
	}
	for(int i = 1;i <= n;i++) {
		Event cur = dragon[border[i].X];
		Event rev = dragon[border[i].Y];
		if(cross(cur.pos, rev.pos, city.X) < 0)	
			swap(border[i].X, border[i].Y);
		//cerr << i << ": " << border[i].X << " " << border[i].Y << "\n";
	}
	origin = mem;
	d_normalize();
	
	origin = city.X, mem = origin;
	normalize(), origin = MP(0, 0);
	sort(dragon + 1, dragon + n + n + 1);
	for(int i = 1, id;i <= n + n;i++) {
		gDragon[abs(dragon[i].clr)].push_back(i);
		id = dragon[i].id;
		if(dragon[i].clr > 0)
			txValue[id] = i;
		if(xBorder[id].X == 0)
			xBorder[id].X = i;
		else
			xBorder[id].Y = i;	
	}   /*
	for(int i = 1;i <= n + n;i++) {
		int val = 0;
		if(dragon[i].clr < 0) continue;
		cerr << dragon[i].id << " " << i << "\n";
	}   */
	for(int i = 1;i <= n;i++) {
		const Event& cur = dragon[xBorder[i].X];
		const Event& rev = dragon[xBorder[i].Y];
		if(cross(cur.pos, rev.pos, city.Y) < 0)	
			swap(xBorder[i].X, xBorder[i].Y);
		//cerr << i << ": " << xBorder[i].X << " " << xBorder[i].Y << "\n";
	}


}

void add_interval(pair<int, int> v, int val) {
	if(v.X <= v.Y) {
		BIT.upd(v.X, val);
		BIT.upd(v.Y + 1, -val);
	}
	else {
		BIT.upd(v.X, val);
		BIT.upd(1, val);
		BIT.upd(v.Y + 1, -val);
	}
}

ll tAnswer[maxN];
int tDragon[maxN], act[maxN];
void solveHeavy(int atk) {
	memset(tAnswer, 0, sizeof(tAnswer));		
	for(int i = 1;i <= n + n;i++){
		
	}
}

ll solveLight(int atk, int def) {		
	int lens = gDragon[atk].size() + gDragon[def].size();
	ll res = 0;
	merge(gDragon[atk].begin(), gDragon[atk].end(),
		  gDragon[def].begin(), gDragon[def].end(), tDragon + 1);
	BIT.clear();
	for(int it = 0;it < 2;it++){
    	for(int i = 1;i <= lens;i++) {
    		const Event& cur = dragon[tDragon[i]];
    		if(-cur.clr == def)
    			continue;	
    		if(cur.clr == def) {
    			if(it == 1)
    				res += BIT.get(tValue[cur.id]);
    		//	cerr << cur.id << " " << tValue[cur.id] << "gg\n";
    		}
    		else if(tDragon[i] == xBorder[cur.id].X) {
  				if(!act[cur.id]) { 
  					act[cur.id] = 1;
  			//		cerr << cur.id << " " << border[cur.id].X << " " << border[cur.id].Y << "was+\n";
  					add_interval(border[cur.id], 1);
    			}	
    		}
    		else {
   				if(act[cur.id]) {
   					act[cur.id] = 0;
   			//		cerr << cur.id << " " << border[cur.id].X << " " << border[cur.id].Y << "was-\n";
   					add_interval(border[cur.id], -1);
   				}
   			}	
    	}
	}
	for(int i = 1;i <= lens;i++) {
    	const Event& cur = dragon[tDragon[i]];
    	act[cur.id] = 0;
    }
    return res;
}

int main () {
	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	inputs();
	prepare();
	/* for(int i = 1;i <= m;i++) {
		if(rQuery[i].size() + Query[i].size() >= block)
			solveHeavy(i);
	} */
	for(int i = 1;i <= m;i++) {
		for(pair<int, int> v: Query[i]) {
			if(answer[v.Y] != -1) 
				continue;
			answer[v.Y] = solveLight(i, v.X);
		}
	}
	for(int i = 1;i <= q;i++)
		cout << answer[i] << "\n";
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 6988 KB Output is correct
2 Correct 16 ms 7048 KB Output is correct
3 Correct 90 ms 7152 KB Output is correct
4 Correct 159 ms 10160 KB Output is correct
5 Correct 73 ms 10852 KB Output is correct
6 Correct 7 ms 7220 KB Output is correct
7 Correct 10 ms 7208 KB Output is correct
8 Correct 7 ms 6964 KB Output is correct
9 Correct 7 ms 6988 KB Output is correct
10 Correct 7 ms 6988 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 41 ms 8528 KB Output is correct
2 Correct 116 ms 9084 KB Output is correct
3 Correct 54 ms 9180 KB Output is correct
4 Correct 38 ms 9156 KB Output is correct
5 Correct 46 ms 9452 KB Output is correct
6 Correct 36 ms 9360 KB Output is correct
7 Correct 34 ms 9236 KB Output is correct
8 Correct 39 ms 9160 KB Output is correct
9 Correct 36 ms 8940 KB Output is correct
10 Correct 40 ms 9044 KB Output is correct

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 6988 KB Output is correct
2 Correct 16 ms 7048 KB Output is correct
3 Correct 90 ms 7152 KB Output is correct
4 Correct 159 ms 10160 KB Output is correct
5 Correct 73 ms 10852 KB Output is correct
6 Correct 7 ms 7220 KB Output is correct
7 Correct 10 ms 7208 KB Output is correct
8 Correct 7 ms 6964 KB Output is correct
9 Correct 7 ms 6988 KB Output is correct
10 Correct 7 ms 6988 KB Output is correct
11 Correct 41 ms 8528 KB Output is correct
12 Correct 116 ms 9084 KB Output is correct
13 Correct 54 ms 9180 KB Output is correct
14 Correct 38 ms 9156 KB Output is correct
15 Correct 46 ms 9452 KB Output is correct
16 Correct 36 ms 9360 KB Output is correct
17 Correct 34 ms 9236 KB Output is correct
18 Correct 39 ms 9160 KB Output is correct
19 Correct 36 ms 8940 KB Output is correct
20 Correct 40 ms 9044 KB Output is correct
21 Correct 42 ms 9220 KB Output is correct
22 Correct 115 ms 9100 KB Output is correct
23 Correct 1112 ms 9352 KB Output is correct
24 Correct 1991 ms 12432 KB Output is correct
25 Correct 279 ms 12868 KB Output is correct
26 Correct 163 ms 13656 KB Output is correct
27 Correct 42 ms 10820 KB Output is correct
28 Correct 47 ms 10784 KB Output is correct
29 Execution timed out 4067 ms 13116 KB Time limit exceeded
30 Halted 0 ms 0 KB -