oj.uz

Submission #758599

# Submission time Handle Problem Language Result Execution time Memory
758599 2023-06-15T00:04:32 Z scanhex Segments (IZhO18_segments) C++17
16 / 100
 1346 ms 25752 KB 
#include <bits/stdc++.h>

using namespace std;
using nagai = long long;

struct dss {
	vector<pair<int,int>> segs;
	void insert(int l, int r) {
		segs.push_back({l, r});
	}
	int get(int l, int r, int k) {
		if (k == 0) return segs.size();
		int res = 0;
		for (auto& x : segs) {
			int ll = max(x.first, l), rr = min(x.second, r); 
			if (rr - ll + 1 >= k)
				++res;
		}
		return res;
	}
};

const int oo = 0x3f3f3f3f;
 
struct static1d {
	vector<int> coords;
	void clear() {
		vector<int>{}.swap(coords);
	}

	void add(int c) {
		coords.push_back(c);
	}

	void finalize() {
	}

	int get(int l, int r) {
		if (l > r) return 0;
		auto itr = upper_bound(coords.begin(), coords.end(), r);
		auto itl = lower_bound(coords.begin(), coords.end(), l);
		//cerr << "coords\n";
		//for(auto& x : coords) 
			//cerr << x << ' ';
		//cerr << '\n';
		//cerr << l << ' ' << r << ' ' << itr - itl << '\n';
		return itr - itl;
	}
};

bool ycmp(pair<int, int> a, pair<int, int> b) {
	if (a.second != b.second)
		return a.second < b.second;
	return a.first < b.first;
}

struct static2d {
	vector<static1d> v;
	vector<int> xs;
	int cnt = 0; 

	void add(int x, int y) {
		++cnt;
		for (++x; x < v.size(); x = (x | x - 1) + 1)
			v[x].add(y);
	}

	void build(vector<pair<int,int>> pts) {
		xs.clear();
		for (auto& x : v) 
			x.clear();
		for (auto& p : pts) 
			xs.push_back(p.first);
		sort(xs.begin(), xs.end());
		xs.erase(unique(xs.begin(), xs.end()), xs.end());
		v.resize(xs.size() + 1);
		cnt = 0;
		for (auto p : pts) {
			add(lower_bound(xs.begin(), xs.end(), p.first) - xs.begin(), p.second);
		}
		for (int i = 0; i < v.size(); ++i) 
			v[i].finalize();
	}

	int get(int xr, int y1, int y2) {
		if (xr == oo) 
			return cnt;
		if (xr < 0) return 0;
		++xr;
		int xrr = xr;
		xr = lower_bound(xs.begin(), xs.end(), xr) - xs.begin();
		int res = 0;
		for (; xr; xr &= xr - 1) 
			res += v[xr].get(y1, y2);
		//cerr << xrr << ' ' << y1 << ' ' << y2 << ' ' << res << '\n';
		return res;
	}

	// all inclusive
	int get(int x1, int x2, int y1, int y2) {
		if (x1 > x2) return 0;
		return get(x2, y1, y2) - get(x1 - 1, y1, y2);
	}
};

const int BL = 3000;

struct rofl2d {
	vector<pair<int,int>> all;
	vector<pair<int,int>> block;
	vector<pair<int,int>> erblock;
	vector<pair<int, int>> newall;
	static2d st;

	void check_rebuild() {
		if (block.size() + erblock.size() >= BL) {
			sort(block.begin(), block.end(), ycmp);
			newall.resize(all.size() + block.size());
			merge(all.begin(), all.end(), block.begin(), block.end(), newall.begin(), ycmp);
			sort(erblock.begin(), erblock.end(), ycmp);
			all.clear();
			int ptr = 0; 
			for (auto x : erblock) {
				 while (ptr < newall.size() && ycmp(newall[ptr], x))
					 all.push_back(newall[ptr++]);
				 // always true? 
				 ++ptr;
			}
			while (ptr < newall.size())
				all.push_back(newall[ptr++]);
			block.clear();
			erblock.clear();
			st.build(all);
		}
	}
	
	void insert(int x, int y) {
		block.push_back({x, y});
		check_rebuild();
	}

	void erase(int x, int y) {
		erblock.push_back({x, y});
		check_rebuild();
	}

	int get(int x1, int x2, int y1, int y2) {
		int res = st.get(x1, x2, y1, y2);
		for (auto p : block) 
			if (x1 <= p.first && p.first <= x2 && y1 <= p.second && p.second <= y2) 
				++res;
		for (auto p : erblock) 
			if (x1 <= p.first && p.first <= x2 && y1 <= p.second && p.second <= y2) 
				--res;
		return res;
	}
};


struct ds {
	int tot = 0;
	rofl2d rofl_l, rofl_r;
	rofl2d rofl_len;
	void insert(int l, int r) {
		++tot;
		rofl_l.insert(l, r - l);
		rofl_r.insert(r, r - l);
		rofl_len.insert(0, r - l);
	}
	void erase(int l, int r) {
		--tot;
		rofl_l.erase(l, r - l);
		rofl_r.erase(r, r - l);
		rofl_len.erase(0, r - l);
	}
	int get(int l, int r, int k) {
		if (r - l + 1 < k) return 0;
		if (k == 0) return tot;
		int res = tot;
		//cerr << "rofl_l" << '\n';
		res -= rofl_l.get(r - k + 2, oo, k - 1, oo);
		//cerr << "rofl_r" << '\n';
		res -= rofl_r.get(0, l + k - 2, k - 1, oo);
		//cerr << "rofl_len" << '\n';
		res -= rofl_len.get(0, 0, 0, k - 2);
		return res;
	}
};

void stress() {
	int C = 5;
	for (int i = 0; i < 10000; ++i) {
		ds smart;
		dss stupid;
		stringstream ss;
		for (int i = 0; i < 10; ++i) {
			int x = rand() % C, y = rand() % C;
			if (x > y) swap(x, y);
			ss << "1 " << x << ' ' << y << '\n';
			smart.insert(x, y);
			stupid.insert(x, y);

			int a = rand() % C, b = rand() % C, k = rand() % C;
			if (a > b) swap(a, b);
			if (smart.get(a, b, k) != stupid.get(a, b, k)) {
				ss << smart.get(a, b, k) << ' ' << stupid.get(a, b, k) << '\n';
				ss << "3 " << a << ' ' << b << ' ' << k << '\n';
				cerr << ss.str();
				exit(1);
			}
		}
	}
	exit(0);
}


int main() {
	//stress();
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n, t; 
	cin >> n >> t; 
	int lastans = 0;
	vector<pair<int, int>> segs;
	ds add;
	while (n--) {
		int tt;
		cin >> tt; 
		if (tt == 1) {
			int a, b;
			cin >> a >> b; 
			a ^= t * lastans;
			b ^= t * lastans;
			if (a > b) swap(a, b);
			segs.push_back({a, b});
			add.insert(a, b);
		}
		else if (tt == 2) {
			int id; 
			cin >> id; 
			--id;
			add.erase(segs[id].first, segs[id].second);
		}
		else {
			int a, b, k;
			cin >> a >> b >> k;
			a ^= t * lastans;
			b ^= t * lastans;
			if (a > b) swap(a, b);
			lastans = add.get(a, b, k);
			cout << lastans << '\n';
		}
	}
}

Compilation message

segments.cpp: In member function 'void static2d::add(int, int)':
segments.cpp:64:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<static1d>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |   for (++x; x < v.size(); x = (x | x - 1) + 1)
      |             ~~^~~~~~~~~~
segments.cpp:64:38: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
   64 |   for (++x; x < v.size(); x = (x | x - 1) + 1)
      |                                    ~~^~~
segments.cpp: In member function 'void static2d::build(std::vector<std::pair<int, int> >)':
segments.cpp:81:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<static1d>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |   for (int i = 0; i < v.size(); ++i)
      |                   ~~^~~~~~~~~~
segments.cpp: In member function 'int static2d::get(int, int, int)':
segments.cpp:90:7: warning: unused variable 'xrr' [-Wunused-variable]
   90 |   int xrr = xr;
      |       ^~~
segments.cpp: In member function 'void rofl2d::check_rebuild()':
segments.cpp:124:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |      while (ptr < newall.size() && ycmp(newall[ptr], x))
      |             ~~~~^~~~~~~~~~~~~~~
segments.cpp:129:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  129 |    while (ptr < newall.size())
      |           ~~~~^~~~~~~~~~~~~~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 18 ms 456 KB Output is correct
4 Incorrect 19 ms 492 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1109 ms 13172 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 384 ms 1176 KB Output is correct
2 Correct 368 ms 1132 KB Output is correct
3 Correct 392 ms 1268 KB Output is correct
4 Correct 376 ms 1300 KB Output is correct
5 Correct 1201 ms 20332 KB Output is correct
6 Correct 669 ms 15744 KB Output is correct
7 Correct 1207 ms 16652 KB Output is correct
8 Correct 1346 ms 25480 KB Output is correct
9 Correct 1333 ms 25752 KB Output is correct
10 Correct 1072 ms 17384 KB Output is correct
11 Correct 426 ms 2132 KB Output is correct
12 Correct 1125 ms 20140 KB Output is correct
13 Correct 975 ms 15392 KB Output is correct
14 Correct 680 ms 8008 KB Output is correct
15 Correct 603 ms 7208 KB Output is correct
16 Correct 536 ms 4920 KB Output is correct
17 Correct 1063 ms 13304 KB Output is correct
18 Correct 1057 ms 12708 KB Output is correct
19 Correct 1038 ms 12820 KB Output is correct
20 Correct 1082 ms 13124 KB Output is correct
21 Correct 442 ms 2504 KB Output is correct
22 Correct 820 ms 10672 KB Output is correct
23 Correct 909 ms 14604 KB Output is correct
24 Correct 827 ms 11512 KB Output is correct
25 Correct 377 ms 1340 KB Output is correct
26 Correct 373 ms 1112 KB Output is correct
27 Correct 394 ms 1228 KB Output is correct
28 Correct 374 ms 1200 KB Output is correct
29 Correct 1028 ms 15372 KB Output is correct
30 Correct 984 ms 15300 KB Output is correct
31 Correct 1295 ms 24880 KB Output is correct
32 Correct 1063 ms 17360 KB Output is correct
33 Correct 982 ms 16192 KB Output is correct
34 Correct 612 ms 7160 KB Output is correct
35 Correct 872 ms 13656 KB Output is correct
36 Correct 1031 ms 17072 KB Output is correct

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 378 ms 1188 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 18 ms 456 KB Output is correct
4 Incorrect 19 ms 492 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 18 ms 456 KB Output is correct
4 Incorrect 19 ms 492 KB Output isn't correct
5 Halted 0 ms 0 KB -