oj.uz

답안 #525031

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
525031 2022-02-10T14:07:37 Z blue IOI 바이러스 (JOI21_fever) C++17
6 / 100
 39 ms 77124 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
using namespace std;

using ll = long long;

using mii = map<int, int>;
using vi = vector<int>;
using pii = pair<int, int>;
#define sz(x) int(x.size())

const int dr = 0;
const int dt = 1;
const int dl = 2;
const int dd = 3;

const int INF = 2'000'000'001;

int* X;
int* Y;

struct person
{
	int i;
	int x;
	int y;

	person(int I)
	{
		i = I, x = X[I], y = Y[I];
	}

	person(int X, int Y)
	{
		x = X, y = Y, i = -1;
	}
};

bool operator < (person A, person B)
{
	if(A.x != B.x) return A.x < B.x;
	else return A.y < B.y;
}


struct event
{
	int t;

	int i;
	int p;
};

bool operator < (event A, event B)
{
	return vi{A.t, A.i, A.p} < vi{B.t, B.i, B.p};
}



const int mx = 100'000;

vi L_label(mx), T_label(mx), TL_label(mx), TR_label(mx);
mii L_map, T_map, TL_map, TR_map;
set<person> L_set[mx][4], T_set[mx][4], TL_set[mx][4], TR_set[mx][4];
vi dir;
vi visit;

set<event> tbv;

vi inftime;

void activate(event z);
void reload(int i);


void activate(event z)
{
	int t = z.t, i = z.i, p = z.p;

	// cerr << "activate " << t << ' ' << i << ' ' << p << "\n";

	

	reload(p);
	reload(i);
}

void add_event(int i, int p)
{

	// cerr << "add event " << i << ' ' << p << '\n';

	int t;
	if(X[i] == X[p]) t = abs(Y[i] - Y[p])/2;
	else if(Y[i] == Y[p]) t = abs(X[i] - X[p])/2;
	else t = abs(X[i] - X[p]);


	if(inftime[i] == -1 || inftime[i] > t)
	{
		inftime[i] = t; 
		visit[i] = 1;


		L_set[L_label[i]][dir[i]].erase(person(i));
		T_set[T_label[i]][dir[i]].erase(person(i));
		TL_set[TL_label[i]][dir[i]].erase(person(i));
		TR_set[TR_label[i]][dir[i]].erase(person(i));

		tbv.insert({t, i, p});
	}
}

void reload(int p)
{
	// cerr << "\n\n";
	// cerr << "reload " << p << '\n';
	// cerr << "reload " << p << "\n";

	if(dir[p] == dt)
	{
		// cerr << "entered \n";
		// cerr << "hi\n";
		// auto it = T_set[T_label[p]][dd].lower_bound(person(p));
		// if(it != T_set[T_label[p]][dd].begin())
		// {
		// 	it--;
		// 	int i = it->i;
		// 	add_event(it->i, i);
		// 	T_set[T_label[p]][dd].erase(it);
		// }

		set<person>& z = TL_set[TL_label[p]][dr];



		auto it = z.lower_bound(person(X[p] - inftime[p], INF));

		// cerr << "z = ";
		// for(person xv : z) cerr << xv.x << ' ' << xv.y << " | ";
		// 	cerr << "\n";

		if(it != z.begin())
		{
			it--;
			add_event(it->i, p);
			// cerr << "# " << it->i << '\n';
		}

		set<person>& z2 = TR_set[TR_label[p]][dl];
		it = z2.lower_bound(person(X[p] + inftime[p], -INF));

		// cerr << "z2 = ";
		// for(person xv : z2) cerr << xv.x << ' ' << xv.y << " | ";
		// 	cerr << "\n";

		// cerr << "coords = " << X[0]-Y[0] << ' ' << X[1]-Y[1] << ' ' << X[2]-Y[2] << '\n';

		// cerr << "z = ";
		// for(person q : z) cerr << q.i << " / ";
		// 	cerr << '\n';

		if(it != z2.end())
		{
			add_event(it->i, p);
			// cerr << "#\n";
		}
	}
	else if(dir[p] == dd)
	{
		// cerr << "down p = " << p << '\n';
		set<person>& z = TL_set[TL_label[p]][dl];
		auto it = z.lower_bound(person(X[p] + inftime[p], -INF));

		// cerr << "z = ";
		// for(person q : z) cerr << q.i << " / ";
		// 	cerr << '\n';


		if(it != z.end())
		{
			add_event(it->i, p);
		}

		set<person>& z2 = TR_set[TR_label[p]][dr];
		it = z2.lower_bound(person(X[p] - inftime[p], +INF));
		if(it != z2.begin())
		{
			it--;
			add_event(it->i, p);
		}
	}
	else if(dir[p] == dl)
	{
		set<person>& z = TL_set[TL_label[p]][dd];
		auto it = z.lower_bound(person(X[p] - inftime[p], +INF));
		if(it != z.begin())
		{
			it--;
			add_event(it->i, p);
		}

		set<person>& z2 = TR_set[TR_label[p]][dt];
		it = z2.lower_bound(person(X[p] - inftime[p], +INF));
		if(it != z2.begin())
		{
			it--;
			add_event(it->i, p);
		}
	}
	else if(dir[p] == dr)
	{
		set<person>& z = TL_set[TL_label[p]][dt];
		auto it = z.lower_bound(person(X[p] + inftime[p], -INF));
		if(it != z.end())
		{
			add_event(it->i, p);
		}

		set<person>& z2 = TR_set[TR_label[p]][dd];
		it = z2.lower_bound(person(X[p] + inftime[p], -INF));
		if(it != z2.end())
		{
			add_event(it->i, p);
		}
	}
}



int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);


	int N;
	cin >> N;

	X = new int[N];
	Y = new int[N];
	for(int i = 0; i < N; i++) 
	{
		cin >> X[i] >> Y[i];
		X[i] *= 2;
		Y[i] *= 2;
	}

	int res = 1;

	for(int i = N-1; i >= 0; i--)
	{
		X[i] -= X[0];
		Y[i] -= Y[0];
	}

	// cerr << X[0] << ' ' << X[1] << ' ' << X[2] << '\n';
	// cerr << Y[0] << ' ' << Y[1] << ' ' << Y[2] << '\n';

	for(int t = 0; t < 4; t++)
	{
		// cerr << "\n\n\n\n\n\n t = " << t << '\n';


// if(t == 1)
// {
		L_map.clear();
		T_map.clear();
		TL_map.clear();
		TR_map.clear();

		for(int i = 0; i < N; i++)
		{
			L_map[X[i]] = 0;
			T_map[Y[i]] = 0;
			TL_map[X[i]+Y[i]] = 0;
			TR_map[X[i]-Y[i]] = 0;
		}

		for(mii* mp : {&L_map, &T_map, &TL_map, &TR_map})
		{
			mii& m = *mp;

			int ct = -1;

			for(auto& z : m)
			{
				z.second = ++ct;
			}
		}


		for(int i = 0; i < N; i++)
		{
			L_label[i] = L_map[X[i]];
			T_label[i] = T_map[Y[i]];
			TL_label[i] = TL_map[X[i] + Y[i]];
			TR_label[i] = TR_map[X[i] - Y[i]];
		}	

		//0 = right, 1 = top, 2 = left, 3 = down

		dir = vi(N);
		dir[0] = dt;


		for(int i = 1; i < N; i++)
		{
			if(Y[i] > 0 && X[i]+Y[i] > 0 && Y[i]-X[i] > 0)
				dir[i] = dd;
			else if(Y[i] < 0 && X[i]+Y[i] <= 0 && Y[i]-X[i] <= 0)
				dir[i] = dt;
			else if(X[i] < 0)
				dir[i] = dr;
			else if(X[i] > 0)
				dir[i] = dl;
		}

		// cerr << "dir 3 = " << dir[3] << '\n';

		// cerr << dir[0] << ' ' << dir[1] << ' ' << dir[2] << '\n';


		visit = vi(N, 0);
		inftime = vi(N, -1);

		for(int i = 0; i < N; i++)
		{
			for(int d = 0; d < 4; d++)
			{
				L_set[i][d].clear();
				T_set[i][d].clear();
				TL_set[i][d].clear();
				TR_set[i][d].clear();
			}
		}
		
		for(int i = 1; i < N; i++)
		{
			L_set[L_label[i]][dir[i]].insert(person(i));
			T_set[T_label[i]][dir[i]].insert(person(i));
			TL_set[TL_label[i]][dir[i]].insert(person(i));
			TR_set[TR_label[i]][dir[i]].insert(person(i));
		}





		tbv.insert({0, 0, 0});

		visit[0] = 1;
		inftime[0] = 0;

		while(!tbv.empty())
		{
			event x = *tbv.begin();
			tbv.erase(x);

			activate(x);
		}


		int curr = 0;
		for(int i = 0; i < N; i++) curr += visit[i];

		res = max(res, curr);




// }


		for(int i = 0; i < N; i++)
		{
			int newX = -Y[i], newY = X[i];
			X[i] = newX;
			Y[i] = newY;
		}
	}

	cout << res << '\n';
}

Compilation message

fever.cpp: In function 'void activate(event)':
fever.cpp:82:6: warning: unused variable 't' [-Wunused-variable]
   82 |  int t = z.t, i = z.i, p = z.p;
      |      ^

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 77020 KB Output is correct
2 Correct 35 ms 76948 KB Output is correct
3 Correct 35 ms 76996 KB Output is correct
4 Correct 36 ms 76984 KB Output is correct
5 Correct 35 ms 76904 KB Output is correct
6 Correct 37 ms 77016 KB Output is correct
7 Correct 35 ms 77004 KB Output is correct
8 Correct 36 ms 76980 KB Output is correct
9 Correct 36 ms 76936 KB Output is correct
10 Correct 36 ms 76960 KB Output is correct
11 Correct 39 ms 76992 KB Output is correct
12 Correct 36 ms 77076 KB Output is correct
13 Correct 35 ms 76996 KB Output is correct
14 Correct 37 ms 76992 KB Output is correct
15 Correct 35 ms 77032 KB Output is correct
16 Correct 36 ms 76932 KB Output is correct
17 Correct 35 ms 77028 KB Output is correct
18 Correct 35 ms 76960 KB Output is correct
19 Correct 37 ms 77016 KB Output is correct
20 Correct 36 ms 77044 KB Output is correct
21 Correct 38 ms 77024 KB Output is correct
22 Correct 36 ms 77008 KB Output is correct
23 Correct 36 ms 77020 KB Output is correct
24 Correct 35 ms 76996 KB Output is correct
25 Correct 37 ms 76940 KB Output is correct
26 Correct 35 ms 76944 KB Output is correct
27 Correct 36 ms 76980 KB Output is correct
28 Correct 36 ms 76996 KB Output is correct
29 Correct 35 ms 76996 KB Output is correct
30 Correct 35 ms 76932 KB Output is correct
31 Correct 35 ms 77016 KB Output is correct
32 Incorrect 36 ms 77028 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 77020 KB Output is correct
2 Correct 35 ms 76948 KB Output is correct
3 Correct 35 ms 76996 KB Output is correct
4 Correct 36 ms 76984 KB Output is correct
5 Correct 35 ms 76904 KB Output is correct
6 Correct 37 ms 77016 KB Output is correct
7 Correct 35 ms 77004 KB Output is correct
8 Correct 36 ms 76980 KB Output is correct
9 Correct 36 ms 76936 KB Output is correct
10 Correct 36 ms 76960 KB Output is correct
11 Correct 39 ms 76992 KB Output is correct
12 Correct 36 ms 77076 KB Output is correct
13 Correct 35 ms 76996 KB Output is correct
14 Correct 37 ms 76992 KB Output is correct
15 Correct 35 ms 77032 KB Output is correct
16 Correct 36 ms 76932 KB Output is correct
17 Correct 35 ms 77028 KB Output is correct
18 Correct 35 ms 76960 KB Output is correct
19 Correct 37 ms 77016 KB Output is correct
20 Correct 36 ms 77044 KB Output is correct
21 Correct 38 ms 77024 KB Output is correct
22 Correct 36 ms 77008 KB Output is correct
23 Correct 36 ms 77020 KB Output is correct
24 Correct 35 ms 76996 KB Output is correct
25 Correct 37 ms 76940 KB Output is correct
26 Correct 35 ms 76944 KB Output is correct
27 Correct 36 ms 76980 KB Output is correct
28 Correct 36 ms 76996 KB Output is correct
29 Correct 35 ms 76996 KB Output is correct
30 Correct 35 ms 76932 KB Output is correct
31 Correct 35 ms 77016 KB Output is correct
32 Incorrect 36 ms 77028 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #3
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 77004 KB Output is correct
2 Correct 34 ms 77040 KB Output is correct
3 Correct 36 ms 77032 KB Output is correct
4 Correct 34 ms 77008 KB Output is correct
5 Correct 35 ms 77004 KB Output is correct
6 Correct 35 ms 77036 KB Output is correct
7 Correct 39 ms 77124 KB Output is correct
8 Correct 38 ms 77020 KB Output is correct

Subtask #4
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 77020 KB Output is correct
2 Correct 35 ms 76948 KB Output is correct
3 Correct 35 ms 76996 KB Output is correct
4 Correct 36 ms 76984 KB Output is correct
5 Correct 35 ms 76904 KB Output is correct
6 Correct 37 ms 77016 KB Output is correct
7 Correct 35 ms 77004 KB Output is correct
8 Correct 36 ms 76980 KB Output is correct
9 Correct 36 ms 76936 KB Output is correct
10 Correct 36 ms 76960 KB Output is correct
11 Correct 39 ms 76992 KB Output is correct
12 Correct 36 ms 77076 KB Output is correct
13 Correct 35 ms 76996 KB Output is correct
14 Correct 37 ms 76992 KB Output is correct
15 Correct 35 ms 77032 KB Output is correct
16 Correct 36 ms 76932 KB Output is correct
17 Correct 35 ms 77028 KB Output is correct
18 Correct 35 ms 76960 KB Output is correct
19 Correct 37 ms 77016 KB Output is correct
20 Correct 36 ms 77044 KB Output is correct
21 Correct 38 ms 77024 KB Output is correct
22 Correct 36 ms 77008 KB Output is correct
23 Correct 36 ms 77020 KB Output is correct
24 Correct 35 ms 76996 KB Output is correct
25 Correct 37 ms 76940 KB Output is correct
26 Correct 35 ms 76944 KB Output is correct
27 Correct 36 ms 76980 KB Output is correct
28 Correct 36 ms 76996 KB Output is correct
29 Correct 35 ms 76996 KB Output is correct
30 Correct 35 ms 76932 KB Output is correct
31 Correct 35 ms 77016 KB Output is correct
32 Incorrect 36 ms 77028 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 77020 KB Output is correct
2 Correct 35 ms 76948 KB Output is correct
3 Correct 35 ms 76996 KB Output is correct
4 Correct 36 ms 76984 KB Output is correct
5 Correct 35 ms 76904 KB Output is correct
6 Correct 37 ms 77016 KB Output is correct
7 Correct 35 ms 77004 KB Output is correct
8 Correct 36 ms 76980 KB Output is correct
9 Correct 36 ms 76936 KB Output is correct
10 Correct 36 ms 76960 KB Output is correct
11 Correct 39 ms 76992 KB Output is correct
12 Correct 36 ms 77076 KB Output is correct
13 Correct 35 ms 76996 KB Output is correct
14 Correct 37 ms 76992 KB Output is correct
15 Correct 35 ms 77032 KB Output is correct
16 Correct 36 ms 76932 KB Output is correct
17 Correct 35 ms 77028 KB Output is correct
18 Correct 35 ms 76960 KB Output is correct
19 Correct 37 ms 77016 KB Output is correct
20 Correct 36 ms 77044 KB Output is correct
21 Correct 38 ms 77024 KB Output is correct
22 Correct 36 ms 77008 KB Output is correct
23 Correct 36 ms 77020 KB Output is correct
24 Correct 35 ms 76996 KB Output is correct
25 Correct 37 ms 76940 KB Output is correct
26 Correct 35 ms 76944 KB Output is correct
27 Correct 36 ms 76980 KB Output is correct
28 Correct 36 ms 76996 KB Output is correct
29 Correct 35 ms 76996 KB Output is correct
30 Correct 35 ms 76932 KB Output is correct
31 Correct 35 ms 77016 KB Output is correct
32 Incorrect 36 ms 77028 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #6
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 77020 KB Output is correct
2 Correct 35 ms 76948 KB Output is correct
3 Correct 35 ms 76996 KB Output is correct
4 Correct 36 ms 76984 KB Output is correct
5 Correct 35 ms 76904 KB Output is correct
6 Correct 37 ms 77016 KB Output is correct
7 Correct 35 ms 77004 KB Output is correct
8 Correct 36 ms 76980 KB Output is correct
9 Correct 36 ms 76936 KB Output is correct
10 Correct 36 ms 76960 KB Output is correct
11 Correct 39 ms 76992 KB Output is correct
12 Correct 36 ms 77076 KB Output is correct
13 Correct 35 ms 76996 KB Output is correct
14 Correct 37 ms 76992 KB Output is correct
15 Correct 35 ms 77032 KB Output is correct
16 Correct 36 ms 76932 KB Output is correct
17 Correct 35 ms 77028 KB Output is correct
18 Correct 35 ms 76960 KB Output is correct
19 Correct 37 ms 77016 KB Output is correct
20 Correct 36 ms 77044 KB Output is correct
21 Correct 38 ms 77024 KB Output is correct
22 Correct 36 ms 77008 KB Output is correct
23 Correct 36 ms 77020 KB Output is correct
24 Correct 35 ms 76996 KB Output is correct
25 Correct 37 ms 76940 KB Output is correct
26 Correct 35 ms 76944 KB Output is correct
27 Correct 36 ms 76980 KB Output is correct
28 Correct 36 ms 76996 KB Output is correct
29 Correct 35 ms 76996 KB Output is correct
30 Correct 35 ms 76932 KB Output is correct
31 Correct 35 ms 77016 KB Output is correct
32 Incorrect 36 ms 77028 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #7
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 77020 KB Output is correct
2 Correct 35 ms 76948 KB Output is correct
3 Correct 35 ms 76996 KB Output is correct
4 Correct 36 ms 76984 KB Output is correct
5 Correct 35 ms 76904 KB Output is correct
6 Correct 37 ms 77016 KB Output is correct
7 Correct 35 ms 77004 KB Output is correct
8 Correct 36 ms 76980 KB Output is correct
9 Correct 36 ms 76936 KB Output is correct
10 Correct 36 ms 76960 KB Output is correct
11 Correct 39 ms 76992 KB Output is correct
12 Correct 36 ms 77076 KB Output is correct
13 Correct 35 ms 76996 KB Output is correct
14 Correct 37 ms 76992 KB Output is correct
15 Correct 35 ms 77032 KB Output is correct
16 Correct 36 ms 76932 KB Output is correct
17 Correct 35 ms 77028 KB Output is correct
18 Correct 35 ms 76960 KB Output is correct
19 Correct 37 ms 77016 KB Output is correct
20 Correct 36 ms 77044 KB Output is correct
21 Correct 38 ms 77024 KB Output is correct
22 Correct 36 ms 77008 KB Output is correct
23 Correct 36 ms 77020 KB Output is correct
24 Correct 35 ms 76996 KB Output is correct
25 Correct 37 ms 76940 KB Output is correct
26 Correct 35 ms 76944 KB Output is correct
27 Correct 36 ms 76980 KB Output is correct
28 Correct 36 ms 76996 KB Output is correct
29 Correct 35 ms 76996 KB Output is correct
30 Correct 35 ms 76932 KB Output is correct
31 Correct 35 ms 77016 KB Output is correct
32 Incorrect 36 ms 77028 KB Output isn't correct
33 Halted 0 ms 0 KB -