Submission #853402

#	Time	Username	Problem	Language	Result	Execution time	Memory
853402		parsadox2	Art Exhibition (JOI18_art)	C++14	100 / 100	149 ms	20088 KiB

art

#include <bits/stdc++.h>
#define int long long
using namespace std;

const int N = 5e5 + 10;
int n , a[N] , b[N] , ps[N];
pair<int , int> ar[N];

signed main()
{
	ios::sync_with_stdio(false);  cin.tie(0);  cout.tie(0);
	cin >> n;
	for(int i = 0 ; i < n ; i++)
		cin >> ar[i].first >> ar[i].second;
	sort(ar , ar + n);
	for(int i = 0 ; i < n ; i++)
	{
		a[i] = ar[i].first;  b[i] = ar[i].second;
		ps[i] = b[i] + (i == 0 ? 0 : ps[i - 1]);
	}
	int ans = 0;
	int mx = -1e15;
	for(int i = n - 1 ; i > -1 ; i--)
	{
		mx = max(mx , ps[i] - a[i]);
		ans = max(ans , mx - (i == 0 ? 0 : ps[i - 1]) + a[i]);
	}
	cout << ans;
	return 0;
}

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