Submission #944922

#	Time	Username	Problem	Language	Result	Execution time	Memory
944922		siewjh	Triple Jump (JOI19_jumps)	C++17	19 / 100	4022 ms	38792 KiB

jumps

#include <bits/stdc++.h>
using namespace std;
struct node{
	int s, e, m, val;
	node *l, *r;
	node (int _s, int _e){
		s = _s, e = _e, m = (s + e) >> 1, val = 0;
		if (s != e){
			l = new node(s, m);
			r = new node(m + 1, e);
		}
	}
	void update(int p, int v){
		val = max(val, v);
		if (s == e) return;
		else if (p <= m) l->update(p, v);
		else r->update(p, v);
	}
	int query(int x, int y){
		if (x == s && y == e) return val;
		else if (y <= m) return l->query(x, y);
		else if (x > m) return r->query(x, y);
		else return max(l->query(x, m), r->query(m + 1, y));
	}
};
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	int nums; cin >> nums;
	vector<int> vec(nums + 1);
	for (int i = 1; i <= nums; i++) cin >> vec[i];
	int queries; cin >> queries;
	vector<tuple<int, int, int>> qvec(queries);
	for (int i = 0; i < queries; i++){
		int l, r; cin >> l >> r;
		qvec[i] = {r, l, i};
	}
	sort(qvec.begin(), qvec.end());
	vector<int> ans(queries);
	node *root = new node(1, nums), *rootmx = new node(1, nums);
	for (int i = 1; i <= nums; i++) rootmx->update(i, vec[i]);
	int curr = 2;
	for (auto [r, l, qind] : qvec){
		while (curr < r){
			curr++;
			for (int i = curr - 2; i >= 1; i--) root->update(i, vec[i] + rootmx->query(i + 1, (i + curr) >> 1) + vec[curr]);
		}
		ans[qind] = root->query(l, r);
	}
	for (int x : ans) cout << x << '\n';
}

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