제출 #967671

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
967671		ByeWorld	Sure Bet (CEOI17_sure)	C++14	0 / 100	0 ms	348 KiB

sure

#include <bits/stdc++.h>
#define ll long long
#define int long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
const int MAXN = 2e5+10;
const int INF = 4e18+10;
typedef pair<int,int> pii;
typedef pair<pii,int> ipii;
const int MX = 1e9+10;

int n;
vector <ld> vec, vec2;

signed main(){
	// ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n;
	for(int i=1; i<=n; i++){
		ld x, y; cin >> x >> y;
		vec.pb(x); vec2.pb(y);
	}
	sort(vec.rbegin(), vec.rend());
	sort(vec2.rbegin(), vec2.rend());
	ld ANS = 0, le = 0, ri = 0, l = 0, r = 0;
	while(l<vec.size() && r<vec2.size()){
		if(le < ri){
			le--; ri--;
			le += vec[l];
			l++;
		} else {
			le--; ri--;
			ri += vec2[r];
			r++;
		}
		// cout << le << ' '<< ri << " leri\n";
		ANS = max(ANS, min(le, ri));
	}
	cout << fixed << setprecision(6) << ANS<< '\n';
}

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