Submission #682028

#	Time	Username	Problem	Language	Result	Execution time	Memory
682028		ethening	Art Exhibition (JOI18_art)	C++17	100 / 100	189 ms	24720 KiB

art

#include "bits/stdc++.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;

int main() {
	cin.tie(0)->sync_with_stdio(0);
	int n;
	cin >> n;
	vector<pair<ll, ll>> a(n + 5);
	for (int i = 1; i <= n; i++) {
		ll tmp, tmp2;
		cin >> tmp >> tmp2;
		a[i] = make_pair(tmp, tmp2);
	}
	sort(a.begin() + 1, a.begin() + n + 1);
	
	vector<ll> p(n + 5);
	for (int i = 1; i <= n; i++) {
		p[i] = p[i - 1] + a[i].second;
	}
	
	ll ans = 0;
	ll tmp = 0;
	//p[r] - p[l - 1] - (a[r] - a[l])
	for (int i = 1; i <= n; i++) {
		tmp = max(tmp, -p[i - 1] +  a[i].first);
		ans = max(ans, p[i] - a[i].first + tmp);
	}
	cout << ans << endl;
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50