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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#411805#8672. 排队hcywoi0 1ms3456kbC++204.3kb2024-05-15 19:46:452024-05-16 17:38:03

Judging History

你现在查看的是最新测评结果

  • [2024-05-16 17:38:03]
  • 管理员手动重测本题所有提交记录
  • 测评结果:0
  • 用时:1ms
  • 内存:3456kb
  • [2024-05-15 19:46:45]
  • 评测
  • 测评结果:0
  • 用时:1ms
  • 内存:3572kb
  • [2024-05-15 19:46:45]
  • 提交

answer

#include <bits/stdc++.h>

using i64 = long long;

template<class Info, class Tag>
struct LazySegmentTree {
	int n;
	std::vector<Info> info;
	std::vector<Tag> tag;
	LazySegmentTree() : n(0) {}
    LazySegmentTree(int n_, Info v_ = Info()) {
        init(n_, v_);
    }
	template<class T>
    LazySegmentTree(std::vector<T> init_) {
        init(init_);
    }
    void init(int n_, Info v_ = Info()) {
        init(std::vector(n_, v_));
    }
    template<class T>
    void init(std::vector<T> init_) {
        n = init_.size();
        info.assign(4 << std::__lg(n), Info());
        tag.assign(4 << std::__lg(n), Tag());
        std::function<void(int, int, int)> build = [&](int p, int l, int r) {
            if (l == r) {
                info[p] = init_[l];
                return;
            }
            int m = (l + r) / 2;
            build(p * 2, l, m);
            build(p * 2 + 1, m + 1, r);
            pull(p);
        };
        build(1, 0, n - 1);
    }

	void pull(int p) {
		info[p] = info[p * 2] + info[p * 2 + 1];
	}
	
	void apply(int p, const Tag& v) {
		info[p].apply(v);
		tag[p].apply(v);
	}
	
	void push(int p) {
		apply(p * 2, tag[p]);
		apply(p * 2 + 1, tag[p]);
		tag[p] = Tag();
	}

    void modify(int p, int l, int r, int x, const Info& v) {
        if (l == r) {
            info[p] = v;
            return;
        }

        int m = (l + r) / 2;
        push(p);
        if (x <= m) {
            modify(p * 2, l, m, x, v);
        } else {
            modify(p * 2 + 1, m + 1, r, x, v);
        }
        pull(p);
    }

    void modify(int p, const Info& v) {
        modify(1, 0, n - 1, p, v);
    }
	
	void modify(int p, int l, int r, int x, int y, const Tag& v) {
		if (l >= x && r <= y) {
			apply(p, v);
			return;
		}
		
		int m = (l + r) / 2;
		push(p);
		if (x <= m) {
			modify(p * 2, l, m, x, y, v);
		}
		if (y > m) {
			modify(p * 2 + 1, m + 1, r, x, y, v);
		}
		pull(p);
	}

	void modify(int l, int r, const Tag& v) {
		modify(1, 0, n - 1, l, r, v);
	}
	
	Info query(int p, int l, int r, int x, int y) {
		if (l >= x && r <= y) {
			return info[p];
		}
		
		int m = (l + r) / 2;
		push(p);
		
		Info info = Info();
		if (x <= m) {
			info = info + query(p * 2, l, m, x, y);
		}
		if (y > m) {
			info = info + query(p * 2 + 1, m + 1, r, x, y);
		}
		return info;
	}
	
	Info query(int l, int r) {
		return query(1, 0, n - 1, l, r);
	}

	int search(int p, int l, int r, int k) {
		if (l == r) {
			return l;
		}
		int m = (l + r) / 2;
		push(p);
		if (info[p * 2].min <= k) {
			return search(p * 2, l, m, k);
		} else {
			return search(p * 2 + 1, m + 1, r, k);
		}
	}

	int search(int k) {
		return search(1, 0, n - 1, k);
	}

	int search1(int p, int l, int r, int k) {
		if (l == r) {
			return l;
		}
		int m = (l + r) / 2;
		push(p);
		if (info[p * 2 + 1].max >= k) {
			return search(p * 2 + 1, m + 1, r, k);
		} else if (info[p * 2].max >= k) {
			return search(p * 2, l, m, k);
		}
		return -1;
	}

	int search1(int k) {
		return search1(1, 0, n - 1, k);
	}
};

struct Tag {
	int v = 0;
	void apply(const Tag& a) {
		v += a.v;
	}
};

constexpr int inf = 1E9;
struct Info {
	int max = -inf, min = inf;
	void apply(const Tag& a) {
		max += a.v;
		min += a.v;
	}
};

Info operator+ (Info a, Info b) {
	Info c;
	c.max = std::max(a.max, b.max);
	c.min = std::min(a.min, b.min);
	return c;
}

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

	int n, q;
	std::cin >> n >> q;

	std::vector<int> l(n), r(n);
	for (int i = 0; i < n; i ++ ) {
		std::cin >> l[i] >> r[i];
	}

	std::vector<std::vector<std::pair<int, int>>> qry(n);
	for (int i = 0; i < q; i ++ ) {
		int l, r;
		std::cin >> l >> r;
		l --, r -- ;
		qry[r].emplace_back(l, i);
	}

	std::vector<int> ans(q);
	LazySegmentTree<Info, Tag> seg(n);
	for (int i = 0; i < n; i ++ ) {
		seg.modify(i, {0, 0});
		for (int j = 0; j < i; j ++ ) {
			assert(seg.query(j, j).min >= seg.query(j + 1, j + 1).min);
		}
		int L = seg.search(r[i]), R = seg.search1(l[i]);
		// std::cout << L << " " << R << "\n";
		if (L <= R) {
			seg.modify(L, R, {1});
		}
		for (auto [l, x]: qry[i]) {
			ans[x] = seg.query(l, l).max;
		}
	}
	for (int i = 0; i < q; i ++ ) {
		std::cout << ans[i] << "\n";
	}

	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 0
Time Limit Exceeded

Test #1:

score: 10
Accepted
time: 1ms
memory: 3456kb

input:

3 3
0 0
1 2
0 2
1 1
1 3
2 3

output:

1
3
1

result:

ok 3 number(s): "1 3 1"

Test #2:

score: 0
Time Limit Exceeded

input:

5000 5000
5 10
3 9
3 8
2 7
2 5
3 6
1 5
0 2
7 8
2 10
0 3
3 6
4 6
1 6
4 8
7 8
2 7
3 4
4 9
7 8
2 9
2 5
3 6
0 5
6 7
1 2
2 4
2 10
1 5
7 9
6 9
2 3
9 10
5 5
2 9
3 3
2 7
2 4
0 6
0 3
1 7
7 7
4 8
2 9
4 8
0 10
1 8
1 1
2 7
5 9
1 7
1 7
1 4
2 4
1 4
2 9
1 7
4 7
3 8
1 3
4 6
1 5
1 6
0 0
3 9
4 7
2 8
1 8
1 2
7 8
2 7
2...

output:

11
0
11
0
0
11
11
11
0
0
0
0
11
0
11
11
11
11
11
11
11
0
11
11
11
11
0
0
11
11
11
11
11
0
11
11
0
11
11
11
0
11
0
11
11
0
11
11
11
11
11
0
11
11
5
11
11
0
11
11
11
11
11
11
11
11
11
11
11
11
0
11
11
11
11
11
0
11
0
11
11
11
11
0
11
0
11
11
11
11
11
11
11
11
0
0
11
11
0
0
11
0
0
0
0
11
0
0
0
11
0
0
1...

result:


Subtask #2:

score: 0
Time Limit Exceeded

Test #12:

score: 0
Time Limit Exceeded

input:

200000 200000
3 6
3 3
6 10
1 7
2 7
6 9
4 6
3 4
0 8
0 6
3 5
3 4
1 8
7 8
4 5
0 3
1 5
2 9
1 2
1 2
3 4
5 7
6 10
3 9
4 7
1 6
2 6
1 7
2 5
1 7
6 8
1 1
0 7
7 8
0 9
1 7
3 8
3 7
1 2
4 8
5 6
0 6
5 6
2 7
2 6
0 6
0 6
1 7
2 5
0 3
0 3
7 10
3 8
0 2
3 4
3 7
4 9
0 6
4 7
2 6
8 10
2 10
4 10
3 3
2 6
4 5
3 9
1 8
1 2
2 9
...

output:


result:


Subtask #3:

score: 0
Time Limit Exceeded

Test #22:

score: 0
Time Limit Exceeded

input:

200000 200000
0 1
0 2
0 3
0 4
0 5
0 6
0 7
0 0
0 9
0 10
0 0
0 0
0 13
0 14
0 0
0 16
0 17
0 18
0 19
0 0
0 21
0 22
0 23
0 0
0 0
0 0
0 0
0 28
0 0
0 30
0 31
0 32
0 33
0 34
0 35
0 0
0 0
0 38
0 39
0 40
0 41
0 42
0 43
0 44
0 45
0 46
0 0
0 48
0 49
0 50
0 51
0 52
0 53
0 54
0 55
0 56
0 57
0 0
0 59
0 60
0 0
0 0
...

output:


result:


Subtask #4:

score: 0
Time Limit Exceeded

Test #32:

score: 0
Time Limit Exceeded

input:

200000 200000
0 200000
1 200000
1 200000
0 200000
0 200000
1 200000
1 200000
1 200000
0 200000
1 200000
0 200000
0 200000
1 200000
0 200000
0 200000
0 200000
0 200000
1 200000
0 200000
0 200000
1 200000
0 200000
1 200000
1 200000
1 200000
1 200000
0 200000
0 200000
1 200000
2 200000
1 200000
2 20000...

output:


result:


Subtask #5:

score: 0
Skipped

Dependency #1:

0%

Subtask #6:

score: 0
Skipped

Dependency #5:

0%