Submission #1266155

#	Time	Username	Problem	Language	Result	Execution time	Memory
1266155		WH8	Art Exhibition (JOI18_art)	C++20	100 / 100	620 ms	12160 KiB

art

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

#define int long long 
#define pll pair<int, int>
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define endl '\n'

signed main(){
	int n;cin>>n;
	vector<pair<int,int>> v(n);
	int ans=0;
	for(int i=0;i<n;i++){
		cin>>v[i].f>>v[i].s;
		ans=max(ans,v[i].s);
	}
	sort(v.begin(),v.end());
	vector<int> sfx(n, 0);
	sfx[n-1]=v[n-2].f-v[n-1].f+v[n-1].s;
	for(int i=n-2;i>=1;i--){
		sfx[i]=sfx[i+1]+v[i].s-v[i].f+v[i-1].f;
	}
	//~ for(int i=1;i<n;i++){
		//~ cout<<sfx[i]<<" ";
	//~ }
	//~ cout<<endl;
	int best=0;
	for(int i=n-2;i>=0;i--){
		best=min(best, sfx[i+1]);
		ans=max(ans, v[i].s+sfx[i+1]-best);
	}
	cout<<ans;
}

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