제출 #1268860

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1268860		SmuggingSpun	Segments (IZhO18_segments)	C++20	7 / 100	5094 ms	39936 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 = 500;
	const int INF = 2e9 + 5;
	struct Node{
		int lc, rc, cnt;
		Node(){
			lc = rc = -1;
			cnt = 0;
		}
	};
	struct PersistentSegmentTree{
		vector<Node>st;
		vector<int>p, v;
		int N;
		void init(int id, int l, int r){
			if(l == r){
				return;
			}
			int m = (l + r) >> 1;
			st[id].lc = st.size();
			st.emplace_back(Node());
			st[id].rc = st.size();
			st.emplace_back(Node());
			init(st[id].lc, l, m);
			init(st[id].rc, m + 1, r);
		}
		void update(int id, int l, int r, int x){
			st[id].cnt++;
			if(l == r){
				return;
			}
			int m = (l + r) >> 1;
			if(m < x){
				st.emplace_back(st[st[id].rc]);
				update(st[id].rc = int(st.size()) - 1, m + 1, r, x);
			}
			else{
				st.emplace_back(st[st[id].lc]);
				update(st[id].lc = int(st.size()) - 1, l, m, x);
			}
		}
		void build(vector<pair<int, int>>& range){
			if(range.empty()){
				N = 0;
				return;
			}
			st.clear();
			p.clear();
			v.clear();
			st.emplace_back(Node());
			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){
					st.emplace_back(Node());
					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);
			init(0, 1, N);
			for(int i = 0, j = 0; i < range.size(); i++){
				if(range[i].first != p[j]){
					st[j + 1] = st[j];
					j++;
				}
				update(j, 1, N, lower_bound(v.begin(), v.end(), range[i].second) - v.begin());
			}
		}
		int get_cnt(int id, int l, int r, int u, int v){
			if(l > v || r < u){
				return 0;
			}
			if(u <= l && v >= r){
				return st[id].cnt;
			}
			int m = (l + r) >> 1;
			return get_cnt(st[id].lc, l, m, u, v) + get_cnt(st[id].rc, m + 1, r, u, v);
		}
		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;
			return get_cnt(upper_bound(p.begin(), p.end(), P) - p.begin() - 1, 1, N, l, r);
 		}
	};
	PersistentSegmentTree st_1, st_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>>st_range;
				for(int i = 0; i < range.size(); i++){
					if(!out[i]){
						st_range.emplace_back(range[i]);
					}
				}
				sort(st_range.begin(), st_range.end());
				st_1.build(st_range);
				for(int i = 0; i < st_range.size(); i++){
					st_range[i].second -= st_range[i].first - 1;
				}
				st_2.build(st_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 = st_1.get(b - k + 1, a + k - 1, INF) - st_2.get(b - k + 1, 0, k - 1) + st_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();
	}
}

컴파일 시 표준 에러 (stderr) 메시지

segments.cpp: In function 'int main()':
segments.cpp:222:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  222 |                 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