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답안 #467739

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
467739 2021-08-24T09:11:38 Z pure_mem Dragon 2 (JOI17_dragon2) C++14
60 / 100
 1976 ms 20668 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 = 330, 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;
 
struct node {
	int s = 0;
	node *l = nullptr, *r = nullptr;	
};
int tree_ptr;
node* tree[maxN];
 
node* upd(node* v, int tl, int tr, int pos, int val) {
	if(tl == tr) 
		return new node {(v ? v->s: 0) + val, nullptr, nullptr};
	int tm = (tl + tr) / 2;
	if(pos <= tm) {	
		return new node {(v ? v->s: 0) + val, upd(v ? v->l: v, tl, tm, pos, val), v ? v->r: v};
	}
	else {
		return new node {(v ? v->s: 0) + val, v ? v->l: v, upd(v ? v->r: v, tm + 1, tr, pos, val)};
	}
}
int get(node* v, int tl, int tr, int l, int r){
	if(!v || tl > r || l > tr)
		return 0;
	if(tl >= l && tr <= r)
		return v->s;
	int tm = (tl + tr) / 2;
	return get(v->l, tl, tm, l, r) + get(v->r, tm + 1, tr, l, r);
}
 
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, txValue[i] = id;
		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(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) {
	BIT.clear();
	int len = gDragon[atk].size();
	for(int i = 1;i <= len;i++)
		tDragon[i] = gDragon[atk][i - 1];
	tAnswer[atk] = act[atk] = 0;		
	for(pair<int, int> v: Query[atk]) {
		if(answer[v.Y] != -1) 
			continue;
		tAnswer[v.X] = act[v.X] = 0;	
		for(int i = 0;i < gDragon[v.X].size();i++)
			tDragon[++len] = gDragon[v.X][i];
	}
	sort(tDragon + 1, tDragon + len + 1);

	for(int it = 0;it < 2;it++){
    	for(int i = 1;i <= len;i++) {
    		const Event& cur = dragon[tDragon[i]];
    		if(cur.clr < 0 && cur.clr != -atk)
    			continue;	
    		if(abs(cur.clr) != atk) {
    			if(it == 1)
    				tAnswer[cur.clr] += BIT.get(tValue[cur.id]);
    			//cerr << tAnswer[cur.clr] << "\n";
    		}
    		else if(i == xBorder[cur.id].X) {
  				if(!act[cur.id]) { 
  					act[cur.id] = 1;
  					add_interval(border[cur.id], 1);
    			}	
    		}
    		else {
   				if(act[cur.id]) {
   					act[cur.id] = 0;
   					add_interval(border[cur.id], -1);
   				}
   			}	
    	}
	}
	for(pair<int, int> v: Query[atk]) {
		if(answer[v.Y] != -1) 
			continue;
		answer[v.Y] = tAnswer[v.X];	
	}
}
 
int get(int x, int l, int r){
	if(l <= r)
		return get(tree[x], 1, n + n, l, r);
	//cerr << get(tree[x], 1, n + n, l, n + n) << " " << get(tree[x], 1, n + n, 1, r) << " = ";
	return get(tree[x], 1, n + n, l, n + n) + get(tree[x], 1, n + n, 1, r);		
}
 
int get(int xl, int xr, int l, int r) {
//	cerr << xl << " " << xr << " " << l << " " << r << "\n";
	if(xl <= xr)
		return get(xr, l, r) - get(xl - 1, l, r);
	//cerr << "1: " << get(n + n, l, r) << "\n2: " << get(xr - 1, l, r) << "\n3: " << get(xl, l, r) << "\n";
	return get(n + n, l, r) - get(xl - 1, l, r) + get(xr, l, r); 
}
 
void solveHeavyR(int atk) {
	for(int i = 1;i <= n + n;i++) {
		tree[i] = tree[i - 1];
		int id = dragon[i].id;
		if(dragon[i].clr == atk) {
		//	cerr << i << " " << tValue[id] << "\n";
			tree[i] = upd(tree[i], 1, n + n, tValue[id], 1);
		}	
	}
	for(pair<int, int> v: rQuery[atk]) {
		if(answer[v.Y] != -1)
			continue;
		answer[v.Y] = 0;
		for(int i: gDragon[v.X]) {
			if(dragon[i].clr < 0) continue;
			int id = dragon[i].id;
			int add = get(xBorder[id].X, xBorder[id].Y, border[id].X, border[id].Y);	
			
			answer[v.Y] += add;		
		}
	} 		
}
 
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();

	vector<int> ord(m);
	for(int i = 0;i < m;i++)
		ord[i] = i + 1;
	sort(ord.begin(), ord.end(), [](int lhs, int rhs){return gDragon[lhs].size() > gDragon[rhs].size();});
	for(int i: ord) {
		if(rQuery[i].size() >= block)
			solveHeavy(i), solveHeavyR(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";
}

Compilation message

dragon2.cpp: In function 'void solveHeavy(int)':
dragon2.cpp:238:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  238 |   for(int i = 0;i < gDragon[v.X].size();i++)
      |                 ~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 6988 KB Output is correct
2 Correct 13 ms 7024 KB Output is correct
3 Correct 87 ms 7108 KB Output is correct
4 Correct 156 ms 9352 KB Output is correct
5 Correct 72 ms 9924 KB Output is correct
6 Correct 7 ms 7116 KB Output is correct
7 Correct 7 ms 7116 KB Output is correct
8 Correct 7 ms 6988 KB Output is correct
9 Correct 8 ms 6940 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 44 ms 8676 KB Output is correct
2 Correct 114 ms 8568 KB Output is correct
3 Correct 54 ms 8632 KB Output is correct
4 Correct 38 ms 8552 KB Output is correct
5 Correct 41 ms 8872 KB Output is correct
6 Correct 34 ms 8684 KB Output is correct
7 Correct 35 ms 8524 KB Output is correct
8 Correct 40 ms 8476 KB Output is correct
9 Correct 38 ms 8456 KB Output is correct
10 Correct 46 ms 8516 KB Output is correct

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 6988 KB Output is correct
2 Correct 13 ms 7024 KB Output is correct
3 Correct 87 ms 7108 KB Output is correct
4 Correct 156 ms 9352 KB Output is correct
5 Correct 72 ms 9924 KB Output is correct
6 Correct 7 ms 7116 KB Output is correct
7 Correct 7 ms 7116 KB Output is correct
8 Correct 7 ms 6988 KB Output is correct
9 Correct 8 ms 6940 KB Output is correct
10 Correct 7 ms 6988 KB Output is correct
11 Correct 44 ms 8676 KB Output is correct
12 Correct 114 ms 8568 KB Output is correct
13 Correct 54 ms 8632 KB Output is correct
14 Correct 38 ms 8552 KB Output is correct
15 Correct 41 ms 8872 KB Output is correct
16 Correct 34 ms 8684 KB Output is correct
17 Correct 35 ms 8524 KB Output is correct
18 Correct 40 ms 8476 KB Output is correct
19 Correct 38 ms 8456 KB Output is correct
20 Correct 46 ms 8516 KB Output is correct
21 Correct 41 ms 8676 KB Output is correct
22 Correct 115 ms 8584 KB Output is correct
23 Correct 1104 ms 8756 KB Output is correct
24 Correct 1976 ms 11052 KB Output is correct
25 Correct 245 ms 11364 KB Output is correct
26 Correct 149 ms 12068 KB Output is correct
27 Correct 46 ms 10052 KB Output is correct
28 Correct 49 ms 9956 KB Output is correct
29 Incorrect 133 ms 20668 KB Output isn't correct
30 Halted 0 ms 0 KB -