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답안 #705627

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
705627 2023-03-04T20:08:12 Z Asymmetry Examination (JOI19_examination) C++17
100 / 100
 594 ms 31192 KB 
#include<bits/stdc++.h>
using namespace std;
using LL=long long;
#define FOR(i,l,r) for(int i=(l);i<=(r);++i)
#define REP(i,n) FOR(i,0,(n)-1)
#define ssize(x) int(x.size())
template<class A,class B>auto&operator<<(ostream&o,pair<A,B>p){return o<<'('<<p.first<<", "<<p.second<<')';}
template<class T>auto operator<<(ostream&o,T x)->decltype(x.end(),o){o<<'{';int i=0;for(auto e:x)o<<(", ")+2*!i++<<e;return o<<'}';}
#ifdef DEBUG
#define debug(x...) cerr<<"["#x"]: ",[](auto...$){((cerr<<$<<"; "),...)<<'\n';}(x)
#else
#define debug(...) {}
#endif

/*
 * Opis: Drzewo potęgowe
 * Czas: O(\log n)
 * Użycie:
 *   wszystko indexowane od 0
 *   update(pos, val) dodaje val do elementu pos
 *   query(pos) zwraca sumę na przedziale [0, pos]
 */

struct Fenwick {
	vector<int> s;
	Fenwick(int n) : s(n) {}
	void update(int pos, int val) {
		for(; pos < ssize(s); pos |= pos + 1)
			s[pos] += val;
	}
	int query(int pos) {
		int ret = 0;
		for(pos++; pos > 0; pos &= pos - 1)
			ret += s[pos - 1];
		return ret;
	}
	int query(int l, int r) {
		return query(r) - query(l - 1);
	}
};

int main() {
	cin.tie(0)->sync_with_stdio(0);
	int n, q;
	cin >> n >> q;
	vector S(n, 0), T(n, 0), K(n, 0);
	vector<int> values;
	REP (i, n) {
		cin >> S[i] >> T[i];
		values.emplace_back(S[i]);
		values.emplace_back(T[i]);
		K[i] = S[i] + T[i];
		values.emplace_back(K[i]);
	}
	vector<int> X(q), Y(q), Z(q);
	REP (i, q) {
		cin >> X[i] >> Y[i] >> Z[i];
		values.emplace_back(X[i]);
		values.emplace_back(Y[i]);
		values.emplace_back(Z[i]);
	}
	sort(values.begin(), values.end());
	values.erase(unique(values.begin(), values.end()), values.end());

	auto scale = [&](int x) {
		return (int)(lower_bound(values.begin(), values.end(), x) - values.begin());
	};

	for (int &i : S)
		i = scale(i);
	for (int &i : T)
		i = scale(i);
	for (int &i : K)
		i = scale(i);
	for (int &i : X)
		i = scale(i);
	for (int &i : Y)
		i = scale(i);
	for (int &i : Z)
		i = scale(i);
	debug(S);
	debug(T);
	debug(K);
	debug(X);
	debug(Y);
	debug(Z);

	Fenwick tree(ssize(values));
	vector<int> ans(q);
	auto merge = [&](vector<int> point_id, vector<int> query_id) {
		vector<tuple<int, int, int>> sr;
		for (int id : point_id)
			sr.emplace_back(-S[id], 0, id);
		for (int id : query_id)
			sr.emplace_back(-X[id], 1, id);
		sort(sr.begin(), sr.end());
		for (auto [val, type, id] : sr) {
			if (type)
				ans[id] += tree.query(Y[id], ssize(values) - 1);
			else
				tree.update(T[id], 1);
		}
		for (int id : point_id)
			tree.update(T[id], -1);
	};

	function<void(int, int, vector<int>, vector<int>)> rek =
		[&](int lf, int rg, vector<int> point_id, vector<int> query_id) {
		if (lf == rg) {
			merge(point_id, query_id);
			return;
		}
		int mid = (lf + rg) / 2;
		vector<int> left_point_id, right_point_id, left_query_id, right_query_id;
		for (int i : point_id) {
			if (K[i] <= mid)
				left_point_id.emplace_back(i);
			else
				right_point_id.emplace_back(i);
		}
		for (int i : query_id) {
			if (Z[i] <= mid)
				left_query_id.emplace_back(i);
			else
				right_query_id.emplace_back(i);
		}

		merge(right_point_id, left_query_id);

		rek(lf, mid, left_point_id, left_query_id);
		rek(mid + 1, rg, right_point_id, right_query_id);
	};
	vector<int> point_id(n), query_id(q);
	iota(point_id.begin(), point_id.end(), 0);
	iota(query_id.begin(), query_id.end(), 0);
	rek(0, ssize(values) - 1, point_id, query_id);

	REP (i, q)
		cout << ans[i] << '\n';
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 13 ms 812 KB Output is correct
8 Correct 14 ms 724 KB Output is correct
9 Correct 16 ms 740 KB Output is correct
10 Correct 12 ms 716 KB Output is correct
11 Correct 12 ms 724 KB Output is correct
12 Correct 5 ms 596 KB Output is correct
13 Correct 13 ms 1064 KB Output is correct
14 Correct 17 ms 1068 KB Output is correct
15 Correct 13 ms 1016 KB Output is correct
16 Correct 11 ms 956 KB Output is correct
17 Correct 10 ms 724 KB Output is correct
18 Correct 4 ms 724 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 533 ms 28068 KB Output is correct
2 Correct 528 ms 30228 KB Output is correct
3 Correct 544 ms 30132 KB Output is correct
4 Correct 459 ms 29192 KB Output is correct
5 Correct 489 ms 29068 KB Output is correct
6 Correct 178 ms 16868 KB Output is correct
7 Correct 543 ms 30012 KB Output is correct
8 Correct 534 ms 30208 KB Output is correct
9 Correct 524 ms 29292 KB Output is correct
10 Correct 401 ms 28876 KB Output is correct
11 Correct 436 ms 29064 KB Output is correct
12 Correct 96 ms 17552 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 533 ms 28068 KB Output is correct
2 Correct 528 ms 30228 KB Output is correct
3 Correct 544 ms 30132 KB Output is correct
4 Correct 459 ms 29192 KB Output is correct
5 Correct 489 ms 29068 KB Output is correct
6 Correct 178 ms 16868 KB Output is correct
7 Correct 543 ms 30012 KB Output is correct
8 Correct 534 ms 30208 KB Output is correct
9 Correct 524 ms 29292 KB Output is correct
10 Correct 401 ms 28876 KB Output is correct
11 Correct 436 ms 29064 KB Output is correct
12 Correct 96 ms 17552 KB Output is correct
13 Correct 459 ms 15528 KB Output is correct
14 Correct 446 ms 16700 KB Output is correct
15 Correct 561 ms 30240 KB Output is correct
16 Correct 400 ms 14068 KB Output is correct
17 Correct 418 ms 14008 KB Output is correct
18 Correct 153 ms 14076 KB Output is correct
19 Correct 452 ms 15348 KB Output is correct
20 Correct 476 ms 15388 KB Output is correct
21 Correct 488 ms 15436 KB Output is correct
22 Correct 440 ms 28916 KB Output is correct
23 Correct 444 ms 29048 KB Output is correct
24 Correct 91 ms 17596 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 13 ms 812 KB Output is correct
8 Correct 14 ms 724 KB Output is correct
9 Correct 16 ms 740 KB Output is correct
10 Correct 12 ms 716 KB Output is correct
11 Correct 12 ms 724 KB Output is correct
12 Correct 5 ms 596 KB Output is correct
13 Correct 13 ms 1064 KB Output is correct
14 Correct 17 ms 1068 KB Output is correct
15 Correct 13 ms 1016 KB Output is correct
16 Correct 11 ms 956 KB Output is correct
17 Correct 10 ms 724 KB Output is correct
18 Correct 4 ms 724 KB Output is correct
19 Correct 533 ms 28068 KB Output is correct
20 Correct 528 ms 30228 KB Output is correct
21 Correct 544 ms 30132 KB Output is correct
22 Correct 459 ms 29192 KB Output is correct
23 Correct 489 ms 29068 KB Output is correct
24 Correct 178 ms 16868 KB Output is correct
25 Correct 543 ms 30012 KB Output is correct
26 Correct 534 ms 30208 KB Output is correct
27 Correct 524 ms 29292 KB Output is correct
28 Correct 401 ms 28876 KB Output is correct
29 Correct 436 ms 29064 KB Output is correct
30 Correct 96 ms 17552 KB Output is correct
31 Correct 459 ms 15528 KB Output is correct
32 Correct 446 ms 16700 KB Output is correct
33 Correct 561 ms 30240 KB Output is correct
34 Correct 400 ms 14068 KB Output is correct
35 Correct 418 ms 14008 KB Output is correct
36 Correct 153 ms 14076 KB Output is correct
37 Correct 452 ms 15348 KB Output is correct
38 Correct 476 ms 15388 KB Output is correct
39 Correct 488 ms 15436 KB Output is correct
40 Correct 440 ms 28916 KB Output is correct
41 Correct 444 ms 29048 KB Output is correct
42 Correct 91 ms 17596 KB Output is correct
43 Correct 586 ms 19576 KB Output is correct
44 Correct 588 ms 19608 KB Output is correct
45 Correct 594 ms 20340 KB Output is correct
46 Correct 503 ms 16312 KB Output is correct
47 Correct 509 ms 16444 KB Output is correct
48 Correct 152 ms 12860 KB Output is correct
49 Correct 561 ms 20584 KB Output is correct
50 Correct 544 ms 20012 KB Output is correct
51 Correct 552 ms 20504 KB Output is correct
52 Correct 455 ms 15860 KB Output is correct
53 Correct 453 ms 31192 KB Output is correct