제출 #938327

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
938327		vjudge1	Sure Bet (CEOI17_sure)	C++17	100 / 100	111 ms	3148 KiB

sure

///*                                                    __                    __                        __                    */
///*        ======     _      /| /|  __   _            /   |  |   /|  |   @  |    |  |  | /   /| |\  | /   |  |  @ | /        */
///* \-       ||  |_| |_     / |/ | |  | |_  |-        |   |--|  /-|  |   |  \ \  |==|  |-   /=| | \ | |   |--|  | |-         */
///*          ||  | | |_    /     | |__|  _| |_        \__ |  | /  |  |__ |  __|  |  |  | \ /  | |  \| \__ |  |  | | \        */
///* 
 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define int long long
typedef vector<int> vi;
typedef vector<double> vd;
typedef pair<int,int> pii;
typedef vector<pii> vii;
const int N = 3e5+50, inf = 1e18, mod = 1e9+7;

void solve(){
	int n;
	cin >> n;
	vd a(n+2, 0), b(n+2, 0);
	for(int i = 0; i < n; i++)cin >> a[i] >> b[i];
	sort(a.rbegin(), a.rend());
	sort(b.rbegin(), b.rend());
	double ans = 0;
	vd pr;pr.pb(0);
	for(auto i:b)pr.pb(pr.back()+i);
	double sma = 0, cnt = 0;
	for(int i = 0; i < n; i++){
		sma+=a[i];
		cnt++;
		int l = 0, r = n;
		while(l <= r){
			int m = (l+r)>>1;
			if(sma - (cnt+m) < pr[m] - (cnt+m)){
				r = m-1;
			}else{
				l = m+1;
			}
			ans = max(ans, min(sma-(cnt+m) , pr[m] - (cnt+m)));
		}
		//cout << '\n';
		
	}
	cout << fixed << setprecision(4);
	cout << ans << '\n';
}
main(){
	//ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int test = 1;
	//cin >> test;
	while(test--){
		solve();
	}
}
 
 
 
 
 
 
 
 
 
 
 
 
 

컴파일 시 표준 에러 (stderr) 메시지

sure.cpp:50:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   50 | main(){
      | ^~~~

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