Submission #523236

#	Time	Username	Problem	Language	Result	Execution time	Memory
523236		boykut	Divide and conquer (IZhO14_divide)	C++14	48 / 100	1091 ms	1996 KiB

divide

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

typedef tree<int, null_type, less<int>,
rb_tree_tag, tree_order_statistics_node_update> ordered_set;

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

	int n;
	cin >> n;
	vector<int> x(1 + n), g(1 + n), d(1 + n);
	for (int i = 1; i <= n; i++) {
		cin >> x[i] >> g[i] >> d[i];
	}
	vector<long long> pd(1 + n, 0), pg(1 + n, 0), PG(1 + n, 0);
	for (int i = 1; i <= n; i++) {
		pd[i] = d[i] + pd[i - 1];
		pg[i] = g[i] + pg[i - 1];
	}

	long long ans = 0;
	for (int r = 1; r <= n; r++) {
		long long mn = 1e18;
		for (int l = 1; l <= r; l++) {
			if (pd[r] - x[r] >= pd[l - 1] - x[l]) {
				mn = min(mn, 1LL * pg[l - 1]);
			}
		}
		ans = max(ans, pg[r] - mn);
	}
	cout << ans << '\n';

	return 0;
}

• Subtask 1: 17 / 17
• Subtask 2: 31 / 31
• Subtask 3: 0 / 52