vector<long double> q;
long double v,s;
ll n,x;
ll pb=10;int pi=16;

{
	rd(n);
	rep(n){
		rd(x);
		v=sqrtl(x);
		q.push_back(v);
		push_heap(q.begin(),q.end());
		if(q.size()>100){
			pop_heap(q.begin(),q.end());
			long double a=q.back();
			q.pop_back();
			pop_heap(q.begin(),q.end());
			long double b=q.back();
			q.pop_back();
			q.push_back(a+b);
		}
		s=0;
		for(long double w:q)s+=w;
		while(pb<s) pb*=10,pi--;
		printf("%.*Lf\n",pi,s);
	}
}