oj.uz

답안 #314439

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
314439 2020-10-19T23:13:54 Z MetB Dragon 2 (JOI17_dragon2) C++14
60 / 100
 4000 ms 36520 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
 
using namespace __gnu_pbds;
 
#define N 200001
 
using namespace std;
 
 
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
 
const ll INF = 1e18, MOD = 1e9 + 7, MOD2 = 1e6 + 3;
 
struct Pt {
	ll x, y;
 
	Pt (int x, int y) : x (x), y (y) {}
	Pt () : x (0), y (0) {}
 
	ll cross (const Pt& b) const { return x * b.y - b.x * y; }
	bool operator < (const Pt& b) const { return cross (b) < 0; }
	Pt operator - (const Pt& b) const { return Pt (x - b.x, y - b.y); }
	Pt operator - () const { return Pt (-x, -y); }
} s, e;
 
bool OO = true;

vector <int> vs[N];
Pt p[N], pe[N], ps[N];
 
vector < pair <Pt, int> > ords, orde;

unordered_map <int, ll> qu[N];
 
ll big[N], sz[N];
int n, m, q, bl = 400, refl[N], g[N];
 
struct BIT {
	int n;
	vector <int> t;

	BIT () {}
	BIT (int n) : n (n), t (vector <int> (n + 1)) {}
 
	void update (int x, int d) {
		for (; x <= n; x = (x | (x + 1)))
			t[x] += d;
	}
 
	int get (int r) {
		int sum = 0;
 
		for (; r >= 0; r = (r & (r + 1)) - 1)
			sum += t[r];
 
		return sum;
	}
 
	int get (int l, int r) { return get (r) - get (l - 1); }
} t1 (N), t2 (N);

int find_e (Pt x) {
	return lower_bound (orde.begin(), orde.end(), make_pair (x,-1)) - orde.begin ();
}

void attack_to (int to) {
	t1 = BIT (n);
	t2 = BIT (n);

	for (int i = 0; i < n; i++) {
		if (g[i] == to && !refl[i]) t2.update (find_e (pe[i]), 1);
	}

	for (int i = 0; i < n; i++) {
		int x = ords[i].second, tribe = g[x];
		int ind = find_e (pe[i]);

		if (tribe == to) {
			if (!refl[i]) t2.update (ind, -1);
			else t1.update (ind, 1);
			continue;		
		}

		if (qu[tribe].find (x) == qu[tribe].end ()) continue;

		qu[tribe][x] += t2.get (0, ind - 1) + t1.get (ind, n - 1);
	}

	for (int i = 0; i < n; i++) {
		if (g[i] == to && refl[i]) t1.update (find_e (pe[i]), -1);
	}
}

void attack_from (int from) {
	t1 = BIT (n);
	t2 = BIT (n);

	for (int i = 0; i < n; i++) {
		if (g[i] == from) t2.update (find_e (pe[i]), 1);
	}

	for (int i = 0; i < n; i++) {
		int x = ords[i].second, tribe = g[x];
		int ind = find_e (pe[i]);

		if (tribe == from) {
			t1.update (ind, 1);
			t2.update (ind, -1);	
			continue;		
		}

		if (qu[tribe].find (x) == qu[tribe].end ()) continue;

		if (refl[x]) {
			qu[x][tribe] += t2.get (0, ind - 1);
		} else {
			qu[x][tribe] += t1.get (ind, n - 1);
		}
	}

	for (int i = 0; i < n; i++) {
		if (g[i] == from) t1.update (find_e (pe[i]), -1);
	}
}

int attack_small (int from, int to) {
	ll sum = 0;

	if (OO) cout << "Vectors to:" << endl;
	for (int i : vs[to]) {
		int x = ords[i].second;
		if (!refl[x]) {
			t2.update (find_e (pe[x]), 1);
			if (OO) cout << "t2 Adding " << pe[i].x << ' ' << pe[i].y << ' ' << find_e (pe[i]) << endl;
		}
	}

	int j = 0;

	if (OO) cout << "Vectors from:" << endl;
	for (int i : vs[from]) {
		int x = ords[i].second;
		if (OO) cout << pe[x].x << ' ' << pe[x].y << ' ' << i << endl;
		int ind = find_e (pe[x]);

		while (j < vs[to].size () && vs[to][j] < i) {
			int cur = ords[vs[to][j]].second;
			if (!refl[cur]) {
				t2.update (find_e (pe[cur]), -1);
				if (OO) cout << "t2 Deleting " << pe[cur].x << ' ' << pe[cur].y << ' ' << find_e (pe[cur]) << endl;
			}
			else {
				t1.update (find_e (pe[cur]), 1);
				if (OO) cout << "t1 Adding " << pe[cur].x << ' ' << pe[cur].y << ' ' << find_e (pe[cur]) << endl;
			}
			j++;
		}

		if (OO) cout << "Checking by " << pe[x].x << ' ' << pe[x].y << ' ' << find_e (pe[x]) << endl;
		sum += t1.get (ind, n - 1) + t2.get (0, ind - 1);
	}

	for (int i : vs[to]) {
		int x = ords[i].second, cur = find_e (pe[x]);
		if (t1.get (cur, cur)) t1.update (cur, -1);
		if (t2.get (cur, cur)) t2.update (cur, -1);
	}

	if (OO) {
		for (int i = 0; i < n; i++)
			cout << t2.get (i, i);
		cout << endl;
	}

	return sum;
}
 
int main () {
	OO = false;
	cin >> n >> m;
 
	for (int i = 0; i < n; i++) {
		int a, b, c;
		cin >> a >> b >> c;
		g[i] = c - 1;
		p[i] = Pt (a, b);
	}
 
	int x, y;
 
	cin >> x >> y;
	s = Pt (x, y);
 
	cin >> x >> y;
	e = Pt (x, y);
 
	for (int i = 0; i < n; i++) {
		ps[i] = p[i] - s;
		pe[i] = p[i] - e;
		if (ps[i].cross (e - s) > 0) {
			refl[i] = 1;
			ps[i] = -ps[i], pe[i] = -pe[i];
		}
		orde.push_back ({pe[i], i});
		ords.push_back ({ps[i], i});
	}
 
	sort (ords.begin(), ords.end());
	sort (orde.begin(), orde.end());

	for (int i = 0; i < n; i++) {
		vs[g[ords[i].second]].push_back (i);
	}
 
	cin >> q;
 
	vector < pair <int, int> > e;

	for (int i = 0; i < q; i++) {
		int a, b;
		cin >> a >> b;
		a--, b--;
		e.emplace_back (a, b);

		qu[a][b] = i;
	}

	for (int i = 0; i < m; i++) {
		if (sz[i] > bl) {
			big[i] = 1;
			attack_from (i);
			attack_to (i);
		}
	}

	for (auto [a, b] : e) {
		cout << attack_small (a, b) << endl;
		//if (!big[a] && !big[b]) cout << attack_small (a, b) << endl;
		//else if (big[a] && big[b]) cout << qu[a][b] / 2 << endl;
		//else cout << qu[a][b] << endl;
	}
}

Compilation message

dragon2.cpp: In function 'int attack_small(int, int)':
dragon2.cpp:149:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  149 |   while (j < vs[to].size () && vs[to][j] < i) {
      |          ~~^~~~~~~~~~~~~~~~
dragon2.cpp: In function 'int main()':
dragon2.cpp:239:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  239 |  for (auto [a, b] : e) {
      |            ^

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 27392 KB Output is correct
2 Correct 33 ms 27264 KB Output is correct
3 Correct 117 ms 27512 KB Output is correct
4 Correct 518 ms 33436 KB Output is correct
5 Correct 439 ms 33516 KB Output is correct
6 Correct 31 ms 27520 KB Output is correct
7 Correct 32 ms 27392 KB Output is correct
8 Correct 26 ms 27392 KB Output is correct
9 Correct 24 ms 27256 KB Output is correct
10 Correct 24 ms 27264 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 100 ms 29628 KB Output is correct
2 Correct 197 ms 29744 KB Output is correct
3 Correct 115 ms 29612 KB Output is correct
4 Correct 94 ms 29612 KB Output is correct
5 Correct 99 ms 29996 KB Output is correct
6 Correct 95 ms 29484 KB Output is correct
7 Correct 93 ms 29612 KB Output is correct
8 Correct 97 ms 29612 KB Output is correct
9 Correct 80 ms 29356 KB Output is correct
10 Correct 80 ms 29332 KB Output is correct

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 27392 KB Output is correct
2 Correct 33 ms 27264 KB Output is correct
3 Correct 117 ms 27512 KB Output is correct
4 Correct 518 ms 33436 KB Output is correct
5 Correct 439 ms 33516 KB Output is correct
6 Correct 31 ms 27520 KB Output is correct
7 Correct 32 ms 27392 KB Output is correct
8 Correct 26 ms 27392 KB Output is correct
9 Correct 24 ms 27256 KB Output is correct
10 Correct 24 ms 27264 KB Output is correct
11 Correct 100 ms 29628 KB Output is correct
12 Correct 197 ms 29744 KB Output is correct
13 Correct 115 ms 29612 KB Output is correct
14 Correct 94 ms 29612 KB Output is correct
15 Correct 99 ms 29996 KB Output is correct
16 Correct 95 ms 29484 KB Output is correct
17 Correct 93 ms 29612 KB Output is correct
18 Correct 97 ms 29612 KB Output is correct
19 Correct 80 ms 29356 KB Output is correct
20 Correct 80 ms 29332 KB Output is correct
21 Correct 98 ms 29612 KB Output is correct
22 Correct 212 ms 29612 KB Output is correct
23 Correct 1303 ms 29996 KB Output is correct
24 Correct 2824 ms 35880 KB Output is correct
25 Correct 711 ms 36008 KB Output is correct
26 Correct 564 ms 36520 KB Output is correct
27 Correct 162 ms 31532 KB Output is correct
28 Correct 165 ms 31532 KB Output is correct
29 Execution timed out 4075 ms 36008 KB Time limit exceeded
30 Halted 0 ms 0 KB -