Submission #865283

#	Time	Username	Problem	Language	Result	Execution time	Memory
865283		vjudge1	Sure Bet (CEOI17_sure)	C++17	0 / 100	0 ms	344 KiB

sure

#include <bits/stdc++.h>
#define ll long long
#define Sayan ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define all(a) a.begin() , a.end()
#define Int(a,x) a+1 , a+1+x
#define sz() size()
#define F first
#define S second
#define pb push_back
#define yes cout << "YES\n"
#define no cout << "NO\n"
#define pii pair<ll,ll>
using namespace std ;

const ll N = 1e5+5;
const ll INF = 1e18;
const ll mod = 1e9+7;

/*
ll binpow(ll a , ll b){
    if(b == 0) return 1;
    if(b%2) return binpow(a , b-1) * a % mod;
    ll c = binpow(a , b/2) % mod;
    return c*c%mod;
}
*/
double l[N],r[N];
void solve(){
	ll n;
	cin>>n;
	double mx=-1e5;
	double alll=0;
	for(ll i=1;i<=n;i++){
		cin>>l[i]>>r[i];
		alll+=r[i];
	}
	sort(l+1,l+1+n);
	reverse(l+1,l+1+n);
	sort(r+1,r+1+n);
	reverse(r+1,r+1+n);
	double sum1=0;
	for(ll i=1;i<=n;i++){
		sum1+=l[i];
		double otv=n;
		ll l1=1,r1=n;
		double res=alll;
		while(l1<=r1){
			ll md=(l1+r1)/2;
			double sum2=0;
			for(ll j=1;j<=md;j++){
				double ex=r[j];
				sum2=sum2+ex;
			}
			if(sum2>=sum1){
				r1=md-1;
				otv=md;
				res=sum2;
			}
			else l1=md+1;
		}
//		cout<<res<<" "<<i<<" "<<otv<<"\n";
		double mn=min(sum1-(otv+i),res-(otv+i));
		mx=max(mx,mn);
	}
	cout<<fixed<<setprecision(4)<<mx<<"\n";
}
signed main () {
	Sayan;
	ll t=1;
	//cin>>t;
	while(t--)solve();
}

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