Submission #860222

#	Time	Username	Problem	Language	Result	Execution time	Memory
860222		StefanSebez	Art Exhibition (JOI18_art)	C++14	100 / 100	390 ms	28756 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
const int inf=1e18;
signed main()
{
    int n;cin>>n;
    pair<int,int>a[n+1];
    for(int i=1;i<=n;i++)
	{
		cin>>a[i].fi>>a[i].se;
	}
	sort(a+1,a+n+1);
	int b[n+1],pref[n+1]={0};
	for(int i=1;i<=n;i++)
	{
		pref[i]=pref[i-1]+a[i].se;
		b[i]=pref[i]-a[i].fi;
	}
	/*for(int i=1;i<=n;i++)cout<<a[i].fi<<" ";
	cout<<endl;
	for(int i=1;i<=n;i++)cout<<a[i].se<<" ";
	cout<<endl;
	for(int i=1;i<=n;i++)cout<<pref[i]<<" ";
	cout<<endl;
	for(int i=1;i<=n;i++)cout<<b[i]<<" ";
	cout<<endl;*/
	int maks=-inf,res=-inf;
	for(int i=n;i>=1;i--)
	{
		maks=max(maks,b[i]);
		res=max(res,maks+a[i].fi-pref[i-1]);
	}
	cout<<res<<endl;
    return 0;
}

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