oj.uz

답안 #524882

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
524882 2022-02-10T08:01:57 Z valerikk 3단 점프 (JOI19_jumps) C++17
100 / 100
 924 ms 87864 KB 
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

const int N = 500500;

int t[4 * N];
int mx[4 * N];
int d[4 * N];

void apply(int v, int val) {
	d[v] = max(d[v], val);
	t[v] = max(t[v], mx[v] + val);
}

void push(int v) {
	apply(2 * v, d[v]);
	apply(2 * v + 1, d[v]);
}

void upd(int v, int l, int r, int L, int R, int val) {
	if (l >= R || r <= L) {
		return;
	}
	if (l >= L && r <= R) {
		apply(v, val);
		return;
	}
	push(v);
	int m = (l + r) / 2;
	upd(2 * v, l, m, L, R, val);
	upd(2 * v + 1, m, r, L, R, val);
	t[v] = max({mx[v] + d[v], t[2 * v], t[2 * v + 1]});
}

int get(int v, int l, int r, int L, int R) {
	if (l >= R || r <= L) {
		return (int) -1e9;
	}
	if (l >= L && r <= R) {
		return t[v];
	}
	push(v);
	int m = (l + r) / 2;
	return max(get(2 * v, l, m, L, R), get(2 * v + 1, m, r, L, R));
}

void build(int v, int l, int r, int a[N]) {
	if (r - l == 1) {
		t[v] = -1e9;
		mx[v] = a[l];
		d[v] = -1e9;
	} else {
		int m = (l + r) / 2;
		build(2 * v, l, m, a);
		build(2 * v + 1, m, r, a);
		mx[v] = max(mx[2 * v], mx[2 * v + 1]);
		d[v] = -1e9;
		t[v] = -1e9;
	}
}

int n;
int a[N];
vector<pair<int, int>> qr[N];
vector<int> e[N];
int q;
int ans[N];

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> n;	
	for (int i = 0; i < n; ++i) {
		cin >> a[i];
	}
	cin >> q;
	for (int i = 0; i < q; ++i) {
		int l, r;
		cin >> l >> r;
		--l;
		qr[l].push_back({r, i});
	}
	vector<int> st;
	for (int i = 0; i < n; ++i) {
		while (!st.empty() && a[st.back()] <= a[i]) {
			e[st.back()].push_back(i);
			st.pop_back();
		}
		if (!st.empty()) {
			e[st.back()].push_back(i);
		}
 		st.push_back(i);		
	}
	build(1, 0, n, a);
	for (int i = n - 1; i >= 0; --i) {
		for (int j : e[i]) {
			upd(1, 0, n, i + (j - i) * 2, n, a[i] + a[j]);
		}
		for (auto qq : qr[i]) {
			ans[qq.second] = get(1, 0, n, i, qq.first);
		}
	}
	for (int i = 0; i < q; ++i) {
		cout << ans[i] << "\n";
	}
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23840 KB Output is correct
2 Correct 12 ms 23840 KB Output is correct
3 Correct 13 ms 23860 KB Output is correct
4 Correct 14 ms 23780 KB Output is correct
5 Correct 13 ms 23828 KB Output is correct
6 Correct 13 ms 23756 KB Output is correct
7 Correct 12 ms 23776 KB Output is correct
8 Correct 12 ms 23756 KB Output is correct
9 Correct 12 ms 23832 KB Output is correct
10 Correct 13 ms 23756 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23840 KB Output is correct
2 Correct 12 ms 23840 KB Output is correct
3 Correct 13 ms 23860 KB Output is correct
4 Correct 14 ms 23780 KB Output is correct
5 Correct 13 ms 23828 KB Output is correct
6 Correct 13 ms 23756 KB Output is correct
7 Correct 12 ms 23776 KB Output is correct
8 Correct 12 ms 23756 KB Output is correct
9 Correct 12 ms 23832 KB Output is correct
10 Correct 13 ms 23756 KB Output is correct
11 Correct 321 ms 42668 KB Output is correct
12 Correct 288 ms 42512 KB Output is correct
13 Correct 293 ms 42692 KB Output is correct
14 Correct 324 ms 42648 KB Output is correct
15 Correct 286 ms 42672 KB Output is correct
16 Correct 302 ms 42028 KB Output is correct
17 Correct 290 ms 41960 KB Output is correct
18 Correct 314 ms 41916 KB Output is correct
19 Correct 289 ms 42472 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 133 ms 38988 KB Output is correct
2 Correct 83 ms 38788 KB Output is correct
3 Correct 83 ms 39460 KB Output is correct
4 Correct 133 ms 38940 KB Output is correct
5 Correct 134 ms 38952 KB Output is correct
6 Correct 125 ms 38248 KB Output is correct
7 Correct 135 ms 38244 KB Output is correct
8 Correct 127 ms 38244 KB Output is correct
9 Correct 131 ms 38468 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23840 KB Output is correct
2 Correct 12 ms 23840 KB Output is correct
3 Correct 13 ms 23860 KB Output is correct
4 Correct 14 ms 23780 KB Output is correct
5 Correct 13 ms 23828 KB Output is correct
6 Correct 13 ms 23756 KB Output is correct
7 Correct 12 ms 23776 KB Output is correct
8 Correct 12 ms 23756 KB Output is correct
9 Correct 12 ms 23832 KB Output is correct
10 Correct 13 ms 23756 KB Output is correct
11 Correct 321 ms 42668 KB Output is correct
12 Correct 288 ms 42512 KB Output is correct
13 Correct 293 ms 42692 KB Output is correct
14 Correct 324 ms 42648 KB Output is correct
15 Correct 286 ms 42672 KB Output is correct
16 Correct 302 ms 42028 KB Output is correct
17 Correct 290 ms 41960 KB Output is correct
18 Correct 314 ms 41916 KB Output is correct
19 Correct 289 ms 42472 KB Output is correct
20 Correct 133 ms 38988 KB Output is correct
21 Correct 83 ms 38788 KB Output is correct
22 Correct 83 ms 39460 KB Output is correct
23 Correct 133 ms 38940 KB Output is correct
24 Correct 134 ms 38952 KB Output is correct
25 Correct 125 ms 38248 KB Output is correct
26 Correct 135 ms 38244 KB Output is correct
27 Correct 127 ms 38244 KB Output is correct
28 Correct 131 ms 38468 KB Output is correct
29 Correct 896 ms 82196 KB Output is correct
30 Correct 836 ms 81508 KB Output is correct
31 Correct 735 ms 83456 KB Output is correct
32 Correct 873 ms 82116 KB Output is correct
33 Correct 914 ms 82256 KB Output is correct
34 Correct 867 ms 79880 KB Output is correct
35 Correct 842 ms 79500 KB Output is correct
36 Correct 924 ms 79504 KB Output is correct
37 Correct 870 ms 81032 KB Output is correct
38 Correct 625 ms 87864 KB Output is correct
39 Correct 622 ms 87808 KB Output is correct
40 Correct 618 ms 84420 KB Output is correct
41 Correct 619 ms 84092 KB Output is correct
42 Correct 612 ms 84120 KB Output is correct
43 Correct 619 ms 85796 KB Output is correct
44 Correct 669 ms 87168 KB Output is correct
45 Correct 647 ms 87256 KB Output is correct
46 Correct 639 ms 84144 KB Output is correct
47 Correct 644 ms 83692 KB Output is correct
48 Correct 641 ms 83548 KB Output is correct
49 Correct 666 ms 85716 KB Output is correct
50 Correct 723 ms 85268 KB Output is correct
51 Correct 712 ms 85096 KB Output is correct
52 Correct 694 ms 82684 KB Output is correct
53 Correct 703 ms 82444 KB Output is correct
54 Correct 694 ms 82276 KB Output is correct
55 Correct 726 ms 83908 KB Output is correct