Submission #758612

#	Time	Username	Problem	Language	Result	Execution time	Memory
758612		scanhex	Segments (IZhO18_segments)	C++17	0 / 100	2247 ms	62548 KiB

segments

#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<vector<int>> t;
	vector<vector<int>> ple, pri;
	int n; 
	vector<int> xs;

	void add(int x, int y) {
		x += n;
		while (x > 0) 
			t[x].push_back(y), x >>= 1;
	}

	void finalize(int u, int ul, int ur) {
		if (u >= n) return;
		int ptrle = 0, ptrri = 0;
		ple[u].resize(t[u].size());
		pri[u].resize(t[u].size());
		for (int i = 0; i < t[u].size(); ++i) {
			while (ptrle < t[2 * u].size() && t[2 * u][ptrle] < t[u][i])
				++ptrle;
			while (ptrri < t[2 * u + 1].size() && t[2 * u + 1][ptrri] < t[u][i])
				++ptrri;
			ple[u][i] = ptrle;
			pri[u][i] = ptrri;
		}
		ple[u].push_back(t[2 * u].size());
		pri[u].push_back(t[2 * u + 1].size());
		int um = (ul + ur) / 2;
		finalize(2 * u, ul, um);
		finalize(2 * u + 1, um, ur);
	}

	void build(vector<pair<int,int>> pts) {
		xs.clear();
		for (auto& p : pts) 
			xs.push_back(p.first);
		sort(xs.begin(), xs.end());
		xs.erase(unique(xs.begin(), xs.end()), xs.end());
		n = 1;
		while (n < xs.size()) n *= 2;
		t.assign(2 * n, {});
		ple.assign(2 * n, {});
		pri.assign(2 * n, {});
		for (auto p : pts) {
			add(lower_bound(xs.begin(), xs.end(), p.first) - xs.begin(), p.second);
		}
		finalize(1, 0, n);
	}

	int get(int u, int ul, int ur, int x1, int x2, int y1, int y2) {
		//cerr << u << ' ' << ul << ' ' << ur << ' ' << x1 << ' ' << x2 << ' ' << y1 << ' ' << y2 << ' ' << ple[u].size() << ' ' << t[u].size() << '\n';
		if (x2 <= ul || ur <= x1 || t[u].empty()) return 0; 
		if (x1 <= ul && ur <= x2) {
			return y2 - y1;
		}
		int res = 0;
		int um = (ul + ur) / 2;
		res += get(u * 2, ul, um, x1, x2, ple[u][y1], ple[u][y2]);
		res += get(u * 2 + 1, um, ur, x1, x2, pri[u][y1], pri[u][y2]);
		return res;
	}

	// all inclusive
	int get(int x1, int x2, int y1, int y2) {
		if (n == 0) return 0;
		if (x1 > x2) return 0;
		x1 = lower_bound(xs.begin(), xs.end(), x1) - xs.begin();
		x2 = upper_bound(xs.begin(), xs.end(), x2) - xs.begin();
		y1 = lower_bound(t[1].begin(), t[1].end(), y1) - t[1].begin();
		y2 = upper_bound(t[1].begin(), t[1].end(), y2) - t[1].begin();
		return get(1, 0, n, x1, x2, y1, y2);
	}
};

const int BL = 1000;

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" << ' ' << res  << '\n';
		res -= rofl_l.get(r - k + 2, oo, k - 1, oo);
		//cerr << "rofl_r" << ' ' << res << '\n';
		res -= rofl_r.get(0, l + k - 2, k - 1, oo);
		//cerr << "rofl_len" << ' ' << res << '\n';
		res -= rofl_l.get(0, oo, 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 (stderr)

segments.cpp: In member function 'void static2d::finalize(int, int, int)':
segments.cpp:74:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |   for (int i = 0; i < t[u].size(); ++i) {
      |                   ~~^~~~~~~~~~~~~
segments.cpp:75:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |    while (ptrle < t[2 * u].size() && t[2 * u][ptrle] < t[u][i])
      |           ~~~~~~^~~~~~~~~~~~~~~~~
segments.cpp:77:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |    while (ptrri < t[2 * u + 1].size() && t[2 * u + 1][ptrri] < t[u][i])
      |           ~~~~~~^~~~~~~~~~~~~~~~~~~~~
segments.cpp: In member function 'void static2d::build(std::vector<std::pair<int, int> >)':
segments.cpp:96:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |   while (n < xs.size()) n *= 2;
      |          ~~^~~~~~~~~~~
segments.cpp: In member function 'void rofl2d::check_rebuild()':
segments.cpp:149:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  149 |      while (ptr < newall.size() && ycmp(newall[ptr], x))
      |             ~~~~^~~~~~~~~~~~~~~
segments.cpp:154:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  154 |    while (ptr < newall.size())
      |           ~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 15
• Subtask 3: 0 / 16
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20
• Subtask 6: 0 / 25