Submission #433822

#	Time	Username	Problem	Language	Result	Execution time	Memory
433822		Azimjon	Triple Jump (JOI19_jumps)	C++17	0 / 100	4075 ms	6576 KiB

jumps

// Muallif: Azimjon Mehmonali o'g'li

#include <bits/stdc++.h>

using namespace std;

#define int long long

const long double PI = 3.1415926535897;
const int mod = 1000000007LL;
const int INF = 1e18;

const int N = 500500;

int a[N], t[4 * N];

// void build(1)

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

	int n;
	cin >> n;

	for (int i = 1; i <= n; i++) {
		cin >> a[i];
	}

	// build();

	int q;
	cin >> q;

	function<int(int, int)> f = [&](int l, int r) {
		// cerr << l << " " << r << endl;
		if (r - l + 1 <= 2) return 0ll;
		vector<pair<int, int>> v;
		for (int i = l; i <= r; i++) {
			v.emplace_back(a[i], i);
		}

		sort(v.rbegin(), v.rend());

		int tl = v[0].second, tr = v[1].second;

		if (tl > tr) {
			swap(tl, tr);
		}

		int re = 0;

		for (int i = 1; i <= n; i++) {
			vector<int> d{tl, tr, i};
			sort(d.begin(), d.end());
			if (i == tl || i == tr || l > i || i > r
				|| d[2] - d[1] < d[1] - d[0])
				continue;

			re = max(re, a[i]);
		}

		return max({v[0].first + v[1].first + re, f(l, v[0].second - 1),
					f(v[0].second + 1, r)});
	};

	while (q--) {
		int l, r;
		cin >> l >> r;

		cout << f(l, r) << endl;
	}

	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 27
• Subtask 4: 0 / 54