Submission #1268884

#	Time	Username	Problem	Language	Result	Execution time	Memory
1268884		SmuggingSpun	Segments (IZhO18_segments)	C++20	0 / 100	5092 ms	10936 KiB

segments

#include<bits/stdc++.h>
#define taskname "A"
using namespace std;
typedef long long ll;
int n, t;
namespace sub1{
	void solve(){
		vector<bool>out(n, false);
		vector<pair<int, int>>range;
		for(int _ = 0, last_ans = 0; _ < n; _++){
			int type;
			cin >> type;
			if(type == 1){
				int a, b;
				cin >> a >> b;
				if(t == 1){
					a ^= last_ans;
					b ^= last_ans;
				}
				if(a > b){
					swap(a, b);
				}
				range.emplace_back(a, b);
			}
			else if(type == 2){
				int id;
				cin >> id;
				out[id - 1] = true; 
			}
			else{
				int a, b, k, ans = 0;
				cin >> a >> b >> k;
				if(t == 1){
					a ^= last_ans;
					b ^= last_ans;
				}
				if(a > b){
					swap(a, b);
				}
				for(int i = 0; i < range.size(); i++){
					if(!out[i] && min(range[i].second, b) - max(range[i].first, a) + 1 >= k){
						ans++;
					}
				}
				cout << (last_ans = ans) << "\n";
			}
		}
	}
}
namespace sub23456{
	const int SIZE = 1;
	const int INF = 2e9 + 5;
	const int lim = 2e5 + 5;
	struct Node{
		int lc, rc, cnt;
		Node(){
			lc = rc = -1;
			cnt = 0;
		}
	};
	struct PersistentBIT{
		vector<int>p, v;
		vector<pair<int, int>>bit[lim];
		int N;
		void update(int t, int p){
			for(; p <= N; p += p & -p){
				if(bit[p].empty()){
					bit[p].emplace_back(t, 0);
				}
				else if(bit[p].back().first < t){
					bit[p].emplace_back(bit[p].back());
					bit[p].back().first = t;
				}
				bit[p].back().second++;
			}
		}
		void build(vector<pair<int, int>>& range){
			if(range.empty()){
				N = 0;
				return;
			}
			p.clear();
			v.clear();
			p.emplace_back(-1);
			p.emplace_back(range[0].first);
			v.emplace_back(-1);
			v.emplace_back(range[0].second);
			for(int i = 1; i < range.size(); i++){
				if(range[i].first != range[i - 1].first){
					p.emplace_back(range[i].first);
				}
				v.emplace_back(range[i].second);
			}
			sort(v.begin(), v.end());
			v.resize(unique(v.begin(), v.end()) - v.begin());
			N = v.size();
			v.emplace_back(INF);
			for(int i = 1; i <= N; i++){
				bit[i].clear();
			}
			for(int i = 0, j = 0; i < range.size(); i++){
				if(range[i].first != p[j]){
					j++;
				}
				update(j, lower_bound(v.begin(), v.end(), range[i].second) - v.begin());
			}
		}
		int get_cnt(int t, int p){
			int ans = 0;
			for(; p > 0; p -= p & -p){
				if(!bit[p].empty() && bit[p].back().first >= t && bit[p][0].first <= t){
					ans += bit[p][upper_bound(bit[p].begin(), bit[p].end(), make_pair(t, INF)) - bit[p].begin() - 1].second;
				}
			}
			return ans;
		}
		int get(int P, int l, int r){
			if(N == 0){
				return 0;
			}
			l = lower_bound(v.begin(), v.end(), l) - v.begin();
			r = upper_bound(v.begin(), v.end(), r) - v.begin() - 1;
			P = upper_bound(p.begin(), p.end(), P) - p.begin() - 1;
			return get_cnt(P, r) - get_cnt(P, l - 1);
 		}
	};
	PersistentBIT bit_1, bit_2;
	void solve(){
		vector<bool>out(n, false);
		vector<pair<int, int>>range;
		vector<int>add, rem;
		for(int iq = 0, last_ans = 0, pre_range; iq < n; iq++){
			if(iq % SIZE == 0){
				add.clear();
				rem.clear();
				vector<pair<int, int>>bit_range;
				for(int i = 0; i < range.size(); i++){
					if(!out[i]){
						bit_range.emplace_back(range[i]);
					}
				}
				sort(bit_range.begin(), bit_range.end());
				bit_1.build(bit_range);
				for(int i = 0; i < bit_range.size(); i++){
					bit_range[i].second -= bit_range[i].first - 1;
				}
				bit_2.build(bit_range);
				pre_range = int(range.size()) - 1;
			}
			int type;
			cin >> type;
			if(type == 1){
				int a, b;
				cin >> a >> b;
				if(t == 1){
					a ^= last_ans;
					b ^= last_ans;
				}
				if(a > b){
					swap(a, b);
				}
				add.emplace_back(range.size());
				range.emplace_back(a, b);
			}
			else if(type == 2){
				int i;
				cin >> i;
				out[--i] = true;
				if(i <= pre_range){
					rem.emplace_back(i);
				}
			}
			else{
				int a, b, k;
				cin >> a >> b >> k;
				if(t == 1){
					a ^= last_ans;
					b ^= last_ans;
				}
				if(a > b){
					swap(a, b);
				}
				if(b - a + 1 < k){
					cout << (last_ans = 0) << "\n";
					continue;
				}
				int ans = bit_1.get(b - k + 1, a + k - 1, INF) - bit_2.get(b - k + 1, 0, k - 1) + bit_2.get(a - 1, 0, k - 1);
				for(int& i : add){
					if(!out[i] && min(range[i].second, b) - max(range[i].first, a) + 1 >= k){
						ans++;
					}
				}
				for(int& i : rem){
					if(min(range[i].second, b) - max(range[i].first, a) + 1 >= k){
						ans--;
					}
				}
				cout << (last_ans = ans) << "\n";
			}
		}
	}
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n >> t;
	if(false && n <= 5000){
		sub1::solve();
	}
	else{
		sub23456::solve();
	}
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:206:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  206 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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