Submission #501692

#	Time	Username	Problem	Language	Result	Execution time	Memory
501692		tmn2005	Schools (IZhO13_school)	C++17	20 / 100	2099 ms	40028 KiB

school

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

typedef long long ll;

#define ar array
#define fr first
#define sc second

#define vec vector
#define ret return

#define ins insert
#define mk make_pair
#define pb push_back
#define pf push_front
#define pob pop_back
#define pof pop_front

#define int long long

#define pii pair<int,int>

#define all(s) s.begin(), s.end()
#define allr(s) s.rbegin(), s.rend()

#define NeedForSpeed ios::sync_with_stdio(0),cin.tie(0);
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
const int N=1e6+12,INF=1e9,mod = 1e9+7;
bool iswowel(char n){ n = toupper(n); if(n == 'A' || n == 'O' || n == 'U' || n == 'E' || n == 'I') return true; else return false;}
int n,m,k,l,r,o,ans,res,ok,mx,mn = INF;
vec<pair<int, pii>>v;

main(){
	NeedForSpeed
	int x, y;
    cin>>n>>x>>y;    
    for(int i=1; i<=n; i++){
    	cin>>l>>r;
    	v.pb(mk(l-r, mk(l, r)));
	}
	sort(allr(v));
	multiset<pair<int, pii>>t;
	multiset<pii>s, p;
	
	l = 0;
	for(int i=0; i<x; i++){
		s.ins({v[i].sc.fr, v[i].sc.sc});
		l += v[i].sc.fr;
	}
	for(int i=x; i<n; i++){
		t.ins(v[i]);
		p.ins({v[i].sc.sc, v[i].sc.fr});
	}
	for(int i=x; i<n-y+1; i++){
		auto it = p.end();
		o = y,r = 0;
		while(o--){
			it--;
			r += (it->fr);
		}
		//cout<<l<<" "<<r<<endl;
		res = max(res, l + r);
		r += t.begin()->sc.fr;
		s.ins({t.begin()->sc.sc, t.begin()->sc.fr});
		p.erase(p.find({t.begin()->sc.sc, t.begin()->sc.fr}));
		while(s.size() > x){
			r -= s.begin()->fr;
			s.erase(s.begin());
		}
		t.erase(t.begin());
	}
	cout<<res<<endl;

	return 0;
}

Compilation message (stderr)

school.cpp:34:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   34 | main(){
      | ^~~~
school.cpp: In function 'int main()':
school.cpp:67:18: warning: comparison of integer expressions of different signedness: 'std::multiset<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   67 |   while(s.size() > x){
      |         ~~~~~~~~~^~~

• Subtask 1: 20 / 100