Submission #90920

#	Time	Username	Problem	Language	Result	Execution time	Memory
90920		kylych03	Schools (IZhO13_school)	C++14	30 / 100	75 ms	13560 KiB

school

#include <bits/stdc++.h>
#define int long long
#define sc second
#define fr first


using namespace std;
pair <int, pair<int, int> > ar[100001];
int pr[100002], sf[100002];
multiset <int> st1, st2;
main()
{
	int n,a,b;
	cin>>n>>a>>b;
	
	for(int i=0;i<n;i++){
		cin>>ar[i].sc.fr>>ar[i].sc.sc;
		
		ar[i].fr=ar[i].sc.sc - ar[i].sc.fr;
	}
	
	sort(ar,ar+n);
	int sum=0;
	for(int i=0;i<n;i++){
		if(i<a){
			sum+=ar[i].sc.fr;
			pr[i]=sum;
			st1.insert(ar[i].sc.fr);
		}
		else{
			sum+=ar[i].sc.fr;
			st1.insert(ar[i].sc.fr);
			sum-=(*st1.begin());
			pr[i]=sum;
			st1.erase(*st1.begin());
			
		}
	}
	sum=0;
	for(int i=n-1;i>=0;i--){
		if(n-b <= i){
			sum+=ar[i].sc.sc;
			sf[i]=sum;
			st2.insert(ar[i].sc.sc);
		}
		else{
			sum+=ar[i].sc.sc;
			st2.insert(ar[i].sc.sc);
			sum-=(*st2.begin());
			sf[i]=sum;
			st2.erase(*st2.begin());
		}
	}
	int mx=-10000000000000;
	for(int i=0;i<n;i++)
		mx=max(pr[i] + sf[i+1],mx);
	
	cout<<mx<<endl;	
}

Compilation message (stderr)

school.cpp:11:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^

• Subtask 1: 30 / 100