Submission #379230

#	Time	Username	Problem	Language	Result	Execution time	Memory
379230		penguinhacker	Art Exhibition (JOI18_art)	C++14	100 / 100	255 ms	28908 KiB

art

// source: https://oj.uz/problem/view/JOI18_art
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ar array

const int mxN = 500000;
int n;
ll pre[mxN], suf[mxN];
pair<ll, ll> a[mxN];

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	for (int i = 0; i < n; ++i)
		cin >> a[i].first >> a[i].second;
	sort(a, a + n);
	for (int i = 1; i < n; ++i)
		pre[i] = suf[i] = pre[i - 1] + a[i].second - (a[i].first - a[i - 1].first);
	for (int i = n - 2; ~i; --i)
		suf[i] = max(suf[i], suf[i + 1]);
	ll ans = 0;
	for (int i = 0; i < n; ++i)
		ans = max(ans, suf[i] - pre[i] + a[i].second);
	cout << ans;
	return 0;
}

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