Submission #1094340

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094340		blacktulip	Art Exhibition (JOI18_art)	C++17	100 / 100	165 ms	60052 KiB

art

#include <bits/stdc++.h>

using namespace std;

typedef long long lo; 

#define fi first
#define se second
#define endl "\n"
#define pb push_back
#define int long long
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)
#define _ << " " <<

const lo inf = 1000000000;
const lo li = 500005;
const lo mod = 1000000007;

int n,m,a[li],k,flag,t,b[li],dp[li][2];
int cev;
string s;
vector<int> v;
pair<int,int> p[li];

inline int f(int i,int al){
	int cevap=-1000000000000000000;
	if(i==n+2){
		return 0;
	}
	if(i==n+1){
		return -1000000000000000000;
	}
	if(~dp[i][al])return dp[i][al];
	a[i]=p[i].fi;
	b[i]=p[i].se;
	cevap=max(cevap,f(i+1,al));
	cevap=max(cevap,f(n+2,1)+b[i]-a[i]+(al==0?a[i]:0));
	cevap=max(cevap,f(i+1,1)+b[i]+(al==0?a[i]:0));
	return dp[i][al]=cevap;
}

int32_t main(void){
	fio();
	cin>>n;
	memset(dp,-1,sizeof(dp));
	for(int i=1;i<=n;i++){
		cin>>p[i].fi>>p[i].se;
	}
	sort(p+1,p+n+1);
	cout<<f(1,0)<<endl;
	return 0;
}

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