oj.uz

답안 #433835

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
433835 2021-06-20T11:14:57 Z Azimjon 3단 점프 (JOI19_jumps) C++17
0 / 100
 116 ms 13836 KB 
// 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], b[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];
		b[i] = a[i];
	}

	// build();

	int q;
	cin >> q;

	function<int(int, int, int)> f = [&](int l, int r, int first) {
		// 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]);
		}

		int ans = v[0].first + v[1].first + re;

		if (!first) return ans;

		a[v[0].second] = 0;
		ans = max(ans, f(l, r, false));

		a[v[1].second] = 0;
		ans = max(ans, f(l, r, false));

		a[v[0].second] = b[v[0].second];
		a[v[1].second] = b[v[1].second];
		return ans;
	};

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

		cout << f(l, r, 100) << endl;
	}

	return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 3 ms 332 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 3 ms 332 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 116 ms 13764 KB Output is correct
2 Correct 88 ms 13836 KB Output is correct
3 Correct 100 ms 13808 KB Output is correct
4 Incorrect 112 ms 13756 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 3 ms 332 KB Output isn't correct
3 Halted 0 ms 0 KB -