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답안 #944270

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
944270 2024-03-12T13:26:11 Z LCJLY 3단 점프 (JOI19_jumps) C++14
100 / 100
 780 ms 122452 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define mt make_tuple
 
using ll = long long;
using ii = pair<int, int>;
 
int N, Q, A[500005], ans[500005];
vector<int> ev[500005];
vector<ii> qu[500005];
stack<int> st;
 
struct node {
	node *left, *right;
	int S, E, r_val, A_val, pv;
	node(int _s, int _e) : S(_s), E(_e), r_val(-(int)1e9), pv(-(int)1e9) {
		if (S == E) {
			A_val = A[S];
			return;
		}
		int M = (S + E) / 2;
		left = new node(S, M);
		right = new node(M + 1, E);
		A_val = max(left->A_val, right->A_val);
	}
	void prop() {
		left->r_val = max(left->r_val, pv + left->A_val);
		left->pv = max(left->pv, pv);
		right->r_val = max(right->r_val, pv + right->A_val);
		right->pv = max(right->pv, pv);
	}
	void upd(int l, int r, int v) {
		if (l > E || r < S) {
			return;
		}
		if (l <= S && E <= r) {
			r_val = max(r_val, v + A_val);
			pv = max(pv, v);
			return;
		}
		prop();
		left->upd(l, r, v);
		right->upd(l, r, v);
		r_val = max(left->r_val, right->r_val);
	}
	int qry(int l, int r) {
		if (l > E || r < S) {
			return -(int)1e9;
		}
		if (l <= S && E <= r) {
			return r_val;
		}
		prop();
		return max(left->qry(l, r), right->qry(l, r));
	}
} *root;
 
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; i++) {
		cin >> A[i];
	}
	for (int i = N; i >= 1; i--) {
		while (!st.empty() && A[st.top()] < A[i]) {
			st.pop();
		}
		if (!st.empty()) {
			ev[i].pb(st.top());
		}
		st.push(i);
	}
	while (!st.empty()) {
		st.pop();
	}
	for (int i = 1; i <= N; i++) {
		while (!st.empty() && A[st.top()] < A[i]) {
			st.pop();
		}
		if (!st.empty()) {
			ev[st.top()].pb(i);
		}
		st.push(i);
	}
	cin >> Q;
	for (int i = 1, L, R; i <= Q; i++) {
		cin >> L >> R;
		qu[L].eb(R, i);
	}
	root = new node(1, N);
	for (int i = N; i >= 1; i--) {
		for (auto b : ev[i]) {
			// a = i
			root->upd(2 * b - i, N, A[i] + A[b]);
		}
		for (auto [r, idx] : qu[i]) {
			ans[idx] = root->qry(1, r);
		}
	}
	for (int i = 1; i <= Q; i++) {
		cout << ans[i] << '\n';
	}
}

Compilation message

jumps.cpp: In function 'int main()':
jumps.cpp:101:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  101 |   for (auto [r, idx] : qu[i]) {
      |             ^

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 27224 KB Output is correct
2 Correct 6 ms 27224 KB Output is correct
3 Correct 5 ms 27228 KB Output is correct
4 Correct 6 ms 27228 KB Output is correct
5 Correct 7 ms 27228 KB Output is correct
6 Correct 6 ms 27228 KB Output is correct
7 Correct 6 ms 27224 KB Output is correct
8 Correct 6 ms 27228 KB Output is correct
9 Correct 6 ms 27316 KB Output is correct
10 Correct 6 ms 27260 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 27224 KB Output is correct
2 Correct 6 ms 27224 KB Output is correct
3 Correct 5 ms 27228 KB Output is correct
4 Correct 6 ms 27228 KB Output is correct
5 Correct 7 ms 27228 KB Output is correct
6 Correct 6 ms 27228 KB Output is correct
7 Correct 6 ms 27224 KB Output is correct
8 Correct 6 ms 27228 KB Output is correct
9 Correct 6 ms 27316 KB Output is correct
10 Correct 6 ms 27260 KB Output is correct
11 Correct 170 ms 43092 KB Output is correct
12 Correct 164 ms 43856 KB Output is correct
13 Correct 160 ms 43848 KB Output is correct
14 Correct 160 ms 43856 KB Output is correct
15 Correct 157 ms 43856 KB Output is correct
16 Correct 168 ms 43600 KB Output is correct
17 Correct 167 ms 43180 KB Output is correct
18 Correct 175 ms 43088 KB Output is correct
19 Correct 159 ms 43816 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 105 ms 54524 KB Output is correct
2 Correct 77 ms 54060 KB Output is correct
3 Correct 71 ms 54684 KB Output is correct
4 Correct 107 ms 54608 KB Output is correct
5 Correct 111 ms 54672 KB Output is correct
6 Correct 102 ms 54020 KB Output is correct
7 Correct 103 ms 53732 KB Output is correct
8 Correct 102 ms 53860 KB Output is correct
9 Correct 105 ms 54100 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 27224 KB Output is correct
2 Correct 6 ms 27224 KB Output is correct
3 Correct 5 ms 27228 KB Output is correct
4 Correct 6 ms 27228 KB Output is correct
5 Correct 7 ms 27228 KB Output is correct
6 Correct 6 ms 27228 KB Output is correct
7 Correct 6 ms 27224 KB Output is correct
8 Correct 6 ms 27228 KB Output is correct
9 Correct 6 ms 27316 KB Output is correct
10 Correct 6 ms 27260 KB Output is correct
11 Correct 170 ms 43092 KB Output is correct
12 Correct 164 ms 43856 KB Output is correct
13 Correct 160 ms 43848 KB Output is correct
14 Correct 160 ms 43856 KB Output is correct
15 Correct 157 ms 43856 KB Output is correct
16 Correct 168 ms 43600 KB Output is correct
17 Correct 167 ms 43180 KB Output is correct
18 Correct 175 ms 43088 KB Output is correct
19 Correct 159 ms 43816 KB Output is correct
20 Correct 105 ms 54524 KB Output is correct
21 Correct 77 ms 54060 KB Output is correct
22 Correct 71 ms 54684 KB Output is correct
23 Correct 107 ms 54608 KB Output is correct
24 Correct 111 ms 54672 KB Output is correct
25 Correct 102 ms 54020 KB Output is correct
26 Correct 103 ms 53732 KB Output is correct
27 Correct 102 ms 53860 KB Output is correct
28 Correct 105 ms 54100 KB Output is correct
29 Correct 771 ms 117024 KB Output is correct
30 Correct 666 ms 116360 KB Output is correct
31 Correct 652 ms 118260 KB Output is correct
32 Correct 780 ms 116732 KB Output is correct
33 Correct 738 ms 116744 KB Output is correct
34 Correct 772 ms 114872 KB Output is correct
35 Correct 750 ms 114388 KB Output is correct
36 Correct 759 ms 114332 KB Output is correct
37 Correct 754 ms 115796 KB Output is correct
38 Correct 449 ms 122436 KB Output is correct
39 Correct 460 ms 122452 KB Output is correct
40 Correct 448 ms 119244 KB Output is correct
41 Correct 448 ms 118612 KB Output is correct
42 Correct 442 ms 118624 KB Output is correct
43 Correct 443 ms 120572 KB Output is correct
44 Correct 481 ms 121796 KB Output is correct
45 Correct 504 ms 121840 KB Output is correct
46 Correct 490 ms 118680 KB Output is correct
47 Correct 480 ms 118308 KB Output is correct
48 Correct 476 ms 118376 KB Output is correct
49 Correct 490 ms 120440 KB Output is correct
50 Correct 563 ms 119928 KB Output is correct
51 Correct 535 ms 119892 KB Output is correct
52 Correct 527 ms 117584 KB Output is correct
53 Correct 524 ms 117076 KB Output is correct
54 Correct 530 ms 117512 KB Output is correct
55 Correct 532 ms 118880 KB Output is correct