Submission #865757

#	Time	Username	Problem	Language	Result	Execution time	Memory
865757		vjudge1	Sure Bet (CEOI17_sure)	C++17	100 / 100	70 ms	5192 KiB

sure

//gm  --- akezhon
#include <bits/stdc++.h>
//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define int long long
#define pb push_back
#define F first
#define S second
#define all(v) v.begin(),v.end()
#define pii pair<int,int>
#define tm (tl+tr)/2
#define TL v+v, tl, tm
#define TR v+v+1, tm+1, tr
#define DA l <= tl && tr <= r
#define NET r < tl || tr < l
#define double long double
using namespace std;
const int N=1e5+7;
const int M=1e9+7;
const int inf=1e9;
double a[N], b[N];
int n;
void AlemAmenov(){
	
	cin >> n;
	for(int i=1; i <= n; i++){
		cin >> a[i] >> b[i];
	}
	sort(a+1, a+1+n);
	sort(b+1, b+1+n);
	reverse(a+1, a+1+n);
	reverse(b+1, b+1+n);
	
	double ans=0, aa=0, bb=0;
	int j=0;
	for(int i=1; i <= n; i++){
		aa += a[i];
		ans = max(ans, min(aa, bb)-i-j);
		while(bb < aa && j < n){
			bb += b[++j];
			ans = max(ans, min(aa, bb)-i-j);
		}
		ans = max(ans, min(aa, bb)-i-j);
	}
	cout << fixed << setprecision(4) << ans;
}
signed main(){

	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	// freopen("promote.in", "r", stdin);
	// freopen("promote.out", "w", stdout);
	int RealName=1;
	// cin >> RealName;
	// int C=0;
	while(RealName--){
		// cout << "Case " << ++C << ":\n";
		AlemAmenov();
	}

return 0;
}

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