Submission #164138

#	Time	Username	Problem	Language	Result	Execution time	Memory
164138		cfalas	Art Exhibition (JOI18_art)	C++14	100 / 100	323 ms	28792 KiB

art

#include<bits/stdc++.h>
using namespace std;
#define mp make_pair
#define INF 10000000
#define MOD 1000000007
#define ll long long
#define F first
#define S second
typedef pair<ll, ll> ii;
typedef pair<ii, ll> iii;
typedef vector<ll> vi;
typedef vector<ii> vii;
typedef map<ll, ll> mii;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	ll n;
	cin>>n;
	vii v(n+1);
	for(ll i=1;i<=n;i++){
		cin>>v[i].F>>v[i].S;
	}
	sort(v.begin(), v.end());

	ll pref[n+1];
	pref[0] = 0;
	for(ll i=1;i<=n;i++){
		pref[i] = pref[i-1] +v[i].S;
	}


	ll maxd[n+1];
	maxd[n] = pref[n] - v[n].F;
	for(ll i=n-1;i>=0;i--){
		maxd[i] = max(maxd[i+1], pref[i]-v[i].F);
	}
	ll maxans = 0;
	for(ll i=1;i<=n;i++){
		maxans = max(maxans, v[i].F-pref[i-1] + maxd[i]);
	}
	cout<<maxans<<endl;

}

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