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Submission #622958

# Submission time Handle Problem Language Result Execution time Memory
622958 2022-08-04T21:44:57 Z izanbf Examination (JOI19_examination) C++14
2 / 100
 3000 ms 10908 KB 
#include <bits/stdc++.h>
using namespace std;

#define D(x) cerr << #x << " = " << x << ", "

struct Point {
	int x, y, z;
};

struct Query {
	int a, b, c, id;
};

const int B = 300;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int N, Q;
	cin >> N >> Q;

	vector<Point> pts(N);
	for (int i = 0; i < N; ++i) {
		Point& p = pts[i];
		cin >> p.x >> p.y;
		p.z = p.x + p.y;
	}

	vector<Query> qs(Q);
	for (int i = 0; i < Q; ++i) {
		Query& q = qs[i];
		cin >> q.a >> q.b >> q.c;
		q.id = i;
	}

	sort(qs.begin(), qs.end(), [](const Query& l, const Query& r) {
		return l.c < r.c;
	});

	sort(pts.begin(), pts.end(), [](const Point& l, const Point& r) {
		return l.z < r.z;
	});

	int blocks = (N+B-1)/B;
	vector<vector<Query>> block_queries(blocks);
	int j = 0;

	for (int block = 1; block < blocks; ++block) {
		int i = B*block;
		while (j < Q and qs[j].c <= pts[i].z) {
			block_queries[block-1].push_back(qs[j]);
			++j;
		}
	}
	while (j < Q) {
		block_queries.back().push_back(qs[j]);
		++j;
	}

	vector<int> ans(Q);

	for (int block = 0; block < blocks; ++block) {
		if (block_queries[block].empty()) continue;

		multiset<int> heights;

		vector<Point> in_block;
		in_block.reserve(B);
		for (int i = B*block; i < N and i < B*(block+1); ++i) {
			in_block.push_back(pts[i]);
		}

		vector<Point> over_block;
		over_block.reserve(N-B*block);
		for (int i = B*(block+1); i < N; ++i) {
			over_block.push_back(pts[i]);
			heights.insert(pts[i].y);
		}

		sort(over_block.begin(), over_block.end(), [&](const Point& l, const Point& r) {
			return l.x > r.x;
		});

		sort(block_queries[block].begin(), block_queries[block].end(), [&](const Query& l, const Query& r) {
			return l.a < r.a;
		});

		for (const Query& q : block_queries[block]) {
			int cnt_in = 0;
			int cnt_over = 0;

			// points in block
			for (const Point& p : in_block) {
				if (p.x >= q.a and p.y >= q.b and p.z >= q.c) ++cnt_in;
			}

			// points over block
			while ((not over_block.empty()) and over_block.back().x < q.a) {
				const Point& p = over_block.back();
				heights.erase(heights.find(p.y));
				over_block.pop_back();
			}

			for (int y : heights) {
				if (y >= q.b) {
					++cnt_over;
				}
			}

			// D(q.id), D(block), D(in_block.size()), D(over_block.size()), D(cnt_in), D(cnt_over) << endl;

			ans[q.id] = cnt_in + cnt_over;
		}
	}

	for (int i = 0; i < Q; ++i) {
		cout << ans[i] << '\n';
	}
}

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 276 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 28 ms 644 KB Output is correct
8 Correct 26 ms 640 KB Output is correct
9 Correct 27 ms 536 KB Output is correct
10 Correct 27 ms 640 KB Output is correct
11 Correct 25 ms 644 KB Output is correct
12 Correct 22 ms 596 KB Output is correct
13 Correct 39 ms 744 KB Output is correct
14 Correct 39 ms 728 KB Output is correct
15 Correct 43 ms 748 KB Output is correct
16 Correct 20 ms 692 KB Output is correct
17 Correct 18 ms 756 KB Output is correct
18 Correct 5 ms 596 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3055 ms 10908 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3055 ms 10908 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 276 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 28 ms 644 KB Output is correct
8 Correct 26 ms 640 KB Output is correct
9 Correct 27 ms 536 KB Output is correct
10 Correct 27 ms 640 KB Output is correct
11 Correct 25 ms 644 KB Output is correct
12 Correct 22 ms 596 KB Output is correct
13 Correct 39 ms 744 KB Output is correct
14 Correct 39 ms 728 KB Output is correct
15 Correct 43 ms 748 KB Output is correct
16 Correct 20 ms 692 KB Output is correct
17 Correct 18 ms 756 KB Output is correct
18 Correct 5 ms 596 KB Output is correct
19 Execution timed out 3055 ms 10908 KB Time limit exceeded
20 Halted 0 ms 0 KB -