Submission #865587

#	Time	Username	Problem	Language	Result	Execution time	Memory
865587		vjudge1	Sure Bet (CEOI17_sure)	C++17	0 / 100	1 ms	4444 KiB

sure

#include <bits/stdc++.h>
 
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define optimus_prime ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define fxd(x) fixed << setprecision(x)
#define all(a) (a.begin() , a.end())
#define popcount(x) __builtin_popcount(x)
#define lwb lower_bound
#define upb upper_bound
#define dl long double
#define ll long long
#define pb push_back
#define sz() size()
#define F first
#define S second
 
using namespace std;
 
const ll N = 1e5+9;

ll n;
dl a[N] , b[N] , sum , ans , pref[N];

void solve(){
	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);
	for (int i = 1 ; i <= n ; i++)pref[i]=pref[i-1]+b[i];
	for (int i = 1 ; i <= n ; i++){
		sum+=a[i];
		ll l=1 , r=n , res=0;
		while (l<=r){
			ll md=(l+r)>>1;
			if (pref[md]>=sum)r=md-1 , res=md;
			else l=md+1;
		}
		ans=max(ans , sum-i-res);
	}
	cout << fxd(4) << ans;
}
	
signed main() {
	optimus_prime;
	solve();
return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 40