oj.uz

답안 #853710

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
853710 2023-09-25T05:29:38 Z LeonaRaging 3단 점프 (JOI19_jumps) C++14
100 / 100
 1109 ms 141584 KB 
#include<bits/stdc++.h>
using namespace std;

#define int long long
#define pb emplace_back

const int maxn = 5e5 + 3;
const int INF = 1e9;

void MAX(int &a, int b) {
	if (a < b) a = b;
}

int a[maxn];

struct seg_tree {
	vector<int> t, t2, t3, lazy;
	seg_tree() {
		t.resize(4 * maxn);
		t2.resize(4 * maxn);
		t3.resize(4 * maxn);
		lazy.resize(4 * maxn);
	}
	void pushdown(int v) {
		int val = lazy[v];
		MAX(t[2 * v], val);
		MAX(t[2 * v + 1], val);
		MAX(t3[2 * v], t[2 * v] + t2[2 * v]);
		MAX(t3[2 * v + 1], t[2 * v + 1] + t2[2 * v + 1]);
		MAX(lazy[2 * v], val);
		MAX(lazy[2 * v + 1], val);
	}
	void build(int v = 1, int l = 1, int r = maxn - 1) {
		if (l == r) {
			t2[v] = t3[v] = a[l];
			return;
		}
		int m = (l + r) / 2;
		build(2 * v, l, m);
		build(2 * v + 1, m + 1, r);
		t2[v] = max(t2[2 * v], t2[2 * v + 1]);
		t3[v] = max(t3[2 * v], t3[2 * v + 1]);
	}
	void update(int l, int r, int val, int v = 1, int tl = 1, int tr = maxn - 1) {
		if (tl > r || tr < l) return;
		if (tl >= l && tr <= r) {
			MAX(t[v], val);
			MAX(lazy[v], val);
			MAX(t3[v], t[v] + t2[v]);
			return;
		}
		pushdown(v);
		int m = (tl + tr) / 2;
		update(l, r, val, 2 * v, tl, m);
		update(l, r, val, 2 * v + 1, m + 1, tr);
		t3[v] = max(t3[2 * v], t3[2 * v + 1]);
	}
	int get(int l, int r, int v = 1, int tl = 1, int tr = maxn - 1) {
		if (tl > r || tr < l) return 0;
		if (tl >= l && tr <= r) return t3[v];
		pushdown(v);
		int m = (tl + tr) / 2;
		return max(get(l, r, 2 * v, tl, m), get(l, r, 2 * v + 1, m + 1, tr));
	}
} IT;

int n, q, R[maxn], res[maxn];
vector<pair<int,int>> que[maxn];
stack<int> st;
vector<int> L[maxn];

signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	if (fopen("TRIPLE.INP", "r")) {
		freopen("TRIPLE.INP", "r", stdin);
		freopen("TRIPLE.OUT", "w", stdout);
	}
	cin >> n;
	for (int i = 1; i <= n; i++)
		cin >> a[i];
	IT.build();
	st.push(0); a[0] = INF;
	for (int i = 1; i <= n; i++) {
		while (a[i] > a[st.top()])
			st.pop();
		L[st.top()].pb(i);
		st.push(i);
	}
	cin >> q;
	for (int i = 1, l, r; i <= q; i++) {
		cin >> l >> r;
		que[l].pb(r, i);
	}
	stack<int>().swap(st);
	st.push(n + 1); a[n + 1] = INF;
	for (int i = n; i >= 1; i--) {
		while (a[i] > a[st.top()])
			st.pop();
		R[i] = st.top();
		IT.update(2 * R[i] - i, n, a[i] + a[R[i]]);
		for (int j : L[i])
			IT.update(2 * j - i, n, a[i] + a[j]);
		st.push(i);
		for (auto it : que[i])
			res[it.second] = IT.get(i, it.first);
	}
	for (int i = 1; i <= q; i++)
		cout << res[i] << '\n';
}

Compilation message

jumps.cpp: In function 'int main()':
jumps.cpp:77:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |   freopen("TRIPLE.INP", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:78:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |   freopen("TRIPLE.OUT", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 91992 KB Output is correct
2 Correct 18 ms 91996 KB Output is correct
3 Correct 18 ms 91992 KB Output is correct
4 Correct 20 ms 91996 KB Output is correct
5 Correct 17 ms 91752 KB Output is correct
6 Correct 17 ms 91996 KB Output is correct
7 Correct 18 ms 91996 KB Output is correct
8 Correct 17 ms 91956 KB Output is correct
9 Correct 18 ms 91996 KB Output is correct
10 Correct 18 ms 91996 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 91992 KB Output is correct
2 Correct 18 ms 91996 KB Output is correct
3 Correct 18 ms 91992 KB Output is correct
4 Correct 20 ms 91996 KB Output is correct
5 Correct 17 ms 91752 KB Output is correct
6 Correct 17 ms 91996 KB Output is correct
7 Correct 18 ms 91996 KB Output is correct
8 Correct 17 ms 91956 KB Output is correct
9 Correct 18 ms 91996 KB Output is correct
10 Correct 18 ms 91996 KB Output is correct
11 Correct 257 ms 114948 KB Output is correct
12 Correct 251 ms 115024 KB Output is correct
13 Correct 258 ms 115172 KB Output is correct
14 Correct 256 ms 114896 KB Output is correct
15 Correct 253 ms 115024 KB Output is correct
16 Correct 252 ms 114380 KB Output is correct
17 Correct 254 ms 114328 KB Output is correct
18 Correct 261 ms 114124 KB Output is correct
19 Correct 262 ms 115244 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 222 ms 97612 KB Output is correct
2 Correct 119 ms 98296 KB Output is correct
3 Correct 146 ms 102972 KB Output is correct
4 Correct 223 ms 98812 KB Output is correct
5 Correct 219 ms 98808 KB Output is correct
6 Correct 225 ms 98640 KB Output is correct
7 Correct 224 ms 98492 KB Output is correct
8 Correct 220 ms 98384 KB Output is correct
9 Correct 226 ms 98900 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 91992 KB Output is correct
2 Correct 18 ms 91996 KB Output is correct
3 Correct 18 ms 91992 KB Output is correct
4 Correct 20 ms 91996 KB Output is correct
5 Correct 17 ms 91752 KB Output is correct
6 Correct 17 ms 91996 KB Output is correct
7 Correct 18 ms 91996 KB Output is correct
8 Correct 17 ms 91956 KB Output is correct
9 Correct 18 ms 91996 KB Output is correct
10 Correct 18 ms 91996 KB Output is correct
11 Correct 257 ms 114948 KB Output is correct
12 Correct 251 ms 115024 KB Output is correct
13 Correct 258 ms 115172 KB Output is correct
14 Correct 256 ms 114896 KB Output is correct
15 Correct 253 ms 115024 KB Output is correct
16 Correct 252 ms 114380 KB Output is correct
17 Correct 254 ms 114328 KB Output is correct
18 Correct 261 ms 114124 KB Output is correct
19 Correct 262 ms 115244 KB Output is correct
20 Correct 222 ms 97612 KB Output is correct
21 Correct 119 ms 98296 KB Output is correct
22 Correct 146 ms 102972 KB Output is correct
23 Correct 223 ms 98812 KB Output is correct
24 Correct 219 ms 98808 KB Output is correct
25 Correct 225 ms 98640 KB Output is correct
26 Correct 224 ms 98492 KB Output is correct
27 Correct 220 ms 98384 KB Output is correct
28 Correct 226 ms 98900 KB Output is correct
29 Correct 1109 ms 131416 KB Output is correct
30 Correct 756 ms 130008 KB Output is correct
31 Correct 834 ms 141584 KB Output is correct
32 Correct 1044 ms 131548 KB Output is correct
33 Correct 1043 ms 131516 KB Output is correct
34 Correct 1058 ms 129956 KB Output is correct
35 Correct 1060 ms 129732 KB Output is correct
36 Correct 1049 ms 129736 KB Output is correct
37 Correct 1038 ms 130736 KB Output is correct
38 Correct 842 ms 133972 KB Output is correct
39 Correct 833 ms 133972 KB Output is correct
40 Correct 831 ms 131668 KB Output is correct
41 Correct 807 ms 131296 KB Output is correct
42 Correct 828 ms 131244 KB Output is correct
43 Correct 838 ms 132424 KB Output is correct
44 Correct 910 ms 134288 KB Output is correct
45 Correct 874 ms 134112 KB Output is correct
46 Correct 879 ms 131804 KB Output is correct
47 Correct 871 ms 131820 KB Output is correct
48 Correct 838 ms 131700 KB Output is correct
49 Correct 861 ms 133084 KB Output is correct
50 Correct 920 ms 134488 KB Output is correct
51 Correct 951 ms 134736 KB Output is correct
52 Correct 948 ms 132764 KB Output is correct
53 Correct 931 ms 132948 KB Output is correct
54 Correct 900 ms 132768 KB Output is correct
55 Correct 926 ms 134048 KB Output is correct