#866635 (C++17) No.2292 Interval Union Find

• 問題: No.2292 Interval Union Find
• ユーザー: kwm_t
• 提出日時: 2023-05-05 22:54:04
• 言語: C++17 (gcc 12.3.0 + boost 1.83.0)
• 結果: AC
• 実行時間: 185 ms / 5,000 ms
• コード長: 4,361 bytes
• コンパイル時間: 3,226 ms
• コンパイル使用メモリ: 212,440 KB
• 実行使用メモリ: 15,908 KB
• 最終ジャッジ日時: 2023-08-15 05:49:24
• 合計ジャッジ時間: 12,827 ms
• ジャッジサーバーID （参考情報）: judge15 / judge12

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 4,380 KB
testcase_01	AC	2 ms; 4,380 KB
testcase_02	AC	2 ms; 4,384 KB
testcase_03	AC	2 ms; 4,380 KB
testcase_04	AC	61 ms; 4,384 KB
testcase_05	AC	101 ms; 4,384 KB
testcase_06	AC	60 ms; 4,380 KB
testcase_07	AC	89 ms; 4,380 KB
testcase_08	AC	94 ms; 4,384 KB
testcase_09	AC	95 ms; 4,384 KB
testcase_10	AC	82 ms; 4,384 KB
testcase_11	AC	78 ms; 4,380 KB
testcase_12	AC	95 ms; 4,384 KB
testcase_13	AC	69 ms; 4,380 KB
testcase_14	AC	75 ms; 4,384 KB
testcase_15	AC	77 ms; 4,380 KB
testcase_16	AC	72 ms; 4,380 KB
testcase_17	AC	88 ms; 4,380 KB
testcase_18	AC	171 ms; 15,864 KB
testcase_19	AC	183 ms; 15,908 KB
testcase_20	AC	185 ms; 15,868 KB
testcase_21	AC	161 ms; 10,972 KB
testcase_22	AC	158 ms; 10,888 KB
testcase_23	AC	153 ms; 10,696 KB
testcase_24	AC	154 ms; 10,688 KB
testcase_25	AC	153 ms; 10,732 KB
testcase_26	AC	150 ms; 10,780 KB
testcase_27	AC	152 ms; 10,868 KB
testcase_28	AC	152 ms; 10,704 KB
testcase_29	AC	154 ms; 10,780 KB
testcase_30	AC	150 ms; 10,716 KB
testcase_31	AC	153 ms; 10,720 KB
testcase_32	AC	154 ms; 10,876 KB
testcase_33	AC	157 ms; 10,872 KB
testcase_34	AC	158 ms; 10,712 KB
testcase_35	AC	164 ms; 10,712 KB
testcase_36	AC	169 ms; 10,720 KB
testcase_37	AC	167 ms; 10,744 KB
testcase_38	AC	177 ms; 10,720 KB
testcase_39	AC	160 ms; 10,744 KB
testcase_40	AC	156 ms; 10,780 KB
testcase_41	AC	42 ms; 4,380 KB
testcase_42	AC	44 ms; 4,384 KB
testcase_43	AC	51 ms; 4,384 KB
testcase_44	AC	54 ms; 4,380 KB
testcase_45	AC	55 ms; 4,384 KB
testcase_46	AC	56 ms; 4,384 KB
testcase_47	AC	64 ms; 4,384 KB

ソースコード

#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
template<typename T>
struct RangeSet {
	// ReadMe:閉区間なことに注意
	// member
	set<pair<T, T>>st;
	T TINF;
	// constructor
	RangeSet(T lim) {
		TINF = lim + 1;
		st.emplace(-TINF, -TINF);
		st.emplace(TINF, TINF);
	}
	// cover check
	bool IsCovered(T l, T r) {
		auto ite = prev(st.lower_bound({ l + 1,l + 1 }));
		return ((ite->first <= l) && (r <= ite->second));
	}
	bool IsCovered(T x) { return IsCovered(x, x); }
	// get by covered
	pair<T, T> ByCovered(T l, T r) {
		auto ite = prev(st.lower_bound({ l + 1,l + 1 }));
		if ((ite->first <= l) && (r <= ite->second)) return *ite;
		return { -TINF, -TINF };
	}
	pair<T, T> ByCovered(T  x) { return ByCovered(x, x); }
	// getFront
	pair<T, T>getFront() {
		auto itr = st.begin();
		itr++;
		return *itr;
	}
	// getBack
	pair<T, T>getBack() {
		auto itr = st.end();
		itr--;
		itr--;
		return *itr;
	}
	// insert
	T Insert(T l, T r) {
		//insertでmargeしないver
		//st.emplace(l, r);
		//return 0;
		T sumErase = T(0);
		auto ite = prev(st.lower_bound({ l + 1,l + 1 }));
		// no need merge
		if (IsCovered(l, r))return sumErase;
		// first merge pos
		if ((ite->first <= l) && (l <= (ite->second + 1))) {
			l = ite->first;
			sumErase += ite->second - ite->first + 1;
			ite = st.erase(ite);
		}
		else ite = next(ite);
		// merge
		while (r > ite->second) {
			sumErase += ite->second - ite->first + 1;
			ite = st.erase(ite);
		}
		if (((ite->first - 1) <= r) && (r <= ite->second)) {
			r = ite->second;
			sumErase += ite->second - ite->first + 1;
			st.erase(ite);
		}
		st.emplace(l, r);
		return (r - l + 1) - sumErase;
	}
	T Insert(T x) { return Insert(x, x); }
	// erase
	T Erase(T l, T r) {
		T ret = T(0);
		auto get = ByCovered(l, r);
		if ((-TINF) != get.first) {
			st.erase(get);
			if (get.first != l)st.emplace(get.first, l - 1);
			if (get.second != r)st.emplace(r + 1, get.second);
			ret += r - l + 1;
			return ret;
		}
		auto ite = prev(st.lower_bound({ l + 1,l + 1 }));
		// first erase
		if ((ite->first <= l) && (l <= ite->second)) {
			ret += ite->second - l + 1;
			if (ite->first != l)st.emplace(ite->first, l - 1);
			ite = st.erase(ite);
		}
		else ite = next(ite);
		// erase
		while (ite->second <= r) {
			ret += ite->second - ite->first + 1;
			ite = st.erase(ite);
		}
		// last
		if ((ite->first <= r) && (r <= ite->second)) {
			ret += r - ite->first + 1;
			if (ite->second != r) st.emplace(r + 1, ite->second);
			st.erase(ite);
		}
		return ret;
	}
	T Erase(T x) { return Erase(x, x); }
	// range count
	int size() { return st.size() - 2; }
	// mex
	T Mex(T x = 0) {
		if (!IsCovered(x)) return x;
		auto ite = prev(st.lower_bound({ x + 1, x + 1 }));
		return ite->second + 1;
	}
	// debug
	void Debug() {
		for (auto[l, r] : st)cout << l / 2 << " " << r / 2 << endl;
	}
};
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	RangeSet<long long>rs(LINF);
	int n, q; cin >> n >> q;
	while (q--) {
		int t; cin >> t;
		if (1 == t) {
			int l, r; cin >> l >> r;
			rs.Insert(l * 2, r * 2);
		}
		else if (2 == t) {
			int l, r; cin >> l >> r;
			rs.Erase(l * 2 + 1, r * 2 - 1);
		}
		else if (3 == t) {
			int l, r; cin >> l >> r;
			if (l > r)swap(l, r);
			if (l == r) {
				cout << 1 << endl;
				continue;
			}
			bool ans = rs.IsCovered(l * 2, r * 2);
			cout << ans << endl;
		}
		else {
			int v; cin >> v;
			auto get = rs.ByCovered(v * 2);
			long long l = get.first / 2;
			long long r = get.second / 2;
			long long ans = r - l + 1;
			cout << ans << endl;
		}
		//if (t <= 2) rs.Debug();
	}
	return 0;
}