Submission #891170

#	Time	Username	Problem	Language	Result	Execution time	Memory
891170		vjudge1	Sure Bet (CEOI17_sure)	C++17	100 / 100	89 ms	4724 KiB

sure

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

#define x first
#define y second
#define ll long long
#define ull unsigned long long
#define ld long double
#define pf push_front
#define pb push_back
#define mp make_pair
#define all(v) v.begin(), v.end()

void boost(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	return;
}

void solve(){
	int n;
	cin>>n;
	ld a[n],b[n];
	for(int i=0; i<n; i++) cin>>a[i]>>b[i];
	sort(a,a+n,greater<double>());
	sort(b,b+n,greater<double>());
	int p1=0,p2=0;
	int cnt=0;
	ld suma=0,sumb=0;
	ld ans=0;
	while(p1<n||p2<n){
		if(p1==n||p2==n){
			if(p1==n){
				sumb+=b[p2];
				p2++;
			}
			else{
				suma+=a[p1];
				p1++;
			}
		}
		else{
			if(suma>sumb){
				sumb+=b[p2];
				p2++;
			}
			else{
				suma+=a[p1];
				p1++;
			}
		}
		cnt++;
		ans=max(ans,min(suma,sumb)-cnt);
	}
	cout<<fixed<<setprecision(4)<<ans;
	return;
}

int main(){
	boost();
	solve();
	return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40