제출 #837750

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
837750		Xiaoyang	Balloons (CEOI11_bal)	C++17	0 / 100	957 ms	1416 KiB

bal

#include<bits/stdc++.h>
using namespace std;
 
typedef long long ll;
 
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 1ll<<60
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
#define endl "\n"
void inc(ll &a,ll b) {a=(a+b)%mod;}
void dec(ll &a,ll b) {a=(a-b+mod)%mod;}
int lowbit(ll x) {return x&(-x);}
 
 
vector<pair<ll,ll>>alist;
long double calc(ll a,ll b){
	return a*a/(4*b);
}
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	ll n;cin>>n;
	cout<<fixed<<setprecision(10);
	while(n--){
		long double x,r;cin>>x>>r;
		for(auto p:alist){
			r=min(r,calc(x-p.fi,p.se));
		}
		alist.pb(MP(x,r));
		cout<<r<<endl;
	}
	return 0;
}

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