Submission #1316998

#	Time	Username	Problem	Language	Result	Execution time	Memory
1316998		djsksbrbf	Art Exhibition (JOI18_art)	C++20	0 / 100	9 ms	15928 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef long long ll;
typedef pair <ll, ll> pii;
#define fi first
#define se second
#define pb push_back
const int MAX = 5e5 + 5;

signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	int n; cin >>n;
	vector <pii> v;
	v.pb({0, 0});
	for(int i = 1 ; i <= n ; i++){
		int a, b; cin >> a >> b;
		v.pb({a, b});
	}
	sort(v.begin(), v.end());
	
	ll pref[500005];
	pref[0] = 0;
	for(int i = 1 ; i <= n ; i++)pref[i] = pref[i - 1] + v[i].se;
	
	ll prefu[500005], prefd[500005];
	for(int i = 0 ; i <= n ; i++){
		prefu[i] = prefd[i] = pref[i];
		prefu[i] -= v[i].fi;
		if(i == n)continue;
		prefd[i] -= v[i + 1].fi;
	}
	
	ll suf[500005];
	suf[n + 1] = 0;
	for(int i = n ; i >= 1 ; i--)suf[i] = max(suf[i + 1], prefu[i]);
	ll ans = 0;
	for(int i = 0 ; i <= n ; i++){
		ans = max(ans, suf[i + 1] - prefd[i]);
	}
	cout << ans << endl;
	
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50