Submission #1268896

#	Time	Username	Problem	Language	Result	Execution time	Memory
1268896		SmuggingSpun	Segments (IZhO18_segments)	C++20	7 / 100	464 ms	5732 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 PERIOD = 1500;
	const int SIZE = 500;
	const int INF = 2e9 + 1e8;
	const int lim = 2e5 + 5;
	struct Node{
		int lc, rc, cnt;
		Node(){
			lc = rc = -1;
			cnt = 0;
		}
	};
	struct PersistentBIT{
		vector<vector<int>>block;
		vector<pair<int, int>>range;
		int N;
		void build(vector<pair<int, int>>& r){
			range = r;
			block.clear();
			for(int i = SIZE - 1; i < r.size(); i += SIZE){
				block.emplace_back(vector<int>());
				for(int j = 0; j < SIZE; j++){
					block.back().emplace_back(range[i - j].second);
				}
				sort(block.back().begin(), block.back().end());
			}
		}
		int get(int P, int l, int r){			
			int p = 0, ans = 0;
			for(int i = 0; i < block.size(); i++){
				int j = i * (SIZE + 1) - 1;
				if(j >= range.size() || range[j].first > P){
					p = j - SIZE + 1;
					break;
				} 
				ans += upper_bound(block[i].begin(), block[i].end(), r) - lower_bound(block[i].begin(), block[i].end(), l);
			}
			while(p < range.size() && range[p].first <= P){
				if(l <= range[p].second && r >= range[p].second){
					ans++;
				}
				p++;
			}
			return ans;
 		}
	};
	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 % PERIOD == 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;
				if(out[i - 1]){
					continue;
				}
				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_1.get(min(a + k - 2, b - k + 1), a, a + k - 2) - bit_1.get(a - 1, a, a + k - 2) - 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(n <= 5000){
		sub1::solve();
	}
	else{
		sub23456::solve();
	}
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:178:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  178 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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