using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using static System.Math;
using System.Numerics;
static class Program{
	const int mod=(int)1e9+7;
	const decimal eps=(decimal)1e-11;
	static int n;
	static int[] a;
	static void Main(){
		Sc sc=new Sc();
		n=sc.I;
		a=sc.Ia;
		var e=Tst(-200000,200000);
		Console.WriteLine("{0:f10} {1:f10}",e.Item3,e.Item2);
		Console.WriteLine("{0:f10}",e.Item1);
	}
	static Tuple<decimal,decimal,decimal> Tst(decimal a,decimal b){
		decimal lb=a,ub=b,c1=0,c2=0;
		Tuple<decimal,decimal> d1=null,d2=null;
		while(ub-lb>eps){
			c1=(lb*2+ub)/3;
			c2=(lb+ub*2)/3;
			d1=Tst(c1,-200000,200000);
			d2=Tst(c2,-200000,200000);
			if(d1.Item1>d2.Item1){lb=c1;}
			else{ub=c2;}
		}
		return Tuple.Create(d1.Item1,d1.Item2,c1);
	}
	static Tuple<decimal,decimal> Tst(decimal i,decimal a,decimal b){
		decimal lb=a,ub=b,c1=0,c2=0;
		Tuple<decimal,decimal> d1=null,d2=null;
		while(ub-lb>eps){
			c1=(lb*2+ub)/3;
			c2=(lb+ub*2)/3;
			d1=Fut(i,c1);
			d2=Fut(i,c2);
			if(d1.Item1>d2.Item1){lb=c1;}
			else{ub=c2;}
		}
		return d1;
	}
	static Tuple<decimal,decimal> Fut(decimal d,decimal c){
		decimal g=(c-d)/n;
		decimal p=0;
		for(int i = n-1;i>=0;i--) {
			c-=g;
			p+=Abs(c-a[i])*Abs(c-a[i]);
		}
		return Tuple.Create(p,g);
	}
}

public class Sc{
	public int I{get{return int.Parse(Console.ReadLine());}}
	public long L{get{return long.Parse(Console.ReadLine());}}
	public double D{get{return double.Parse(Console.ReadLine());}}
	public string S{get{return Console.ReadLine();}}
	public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}
	public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}
	public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}
	public string[] Sa{get{return Console.ReadLine().Split();}}
	public object[] Oa{get{return Console.ReadLine().Split();}}
	public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}
	public int[] Ia3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),int.Parse);}
	public int[] Ia3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),long.Parse);}
	public long[] La3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),long.Parse);}
	public double[] Da2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),double.Parse);}}
	public double[] Da3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),double.Parse);}
	public double[] Da3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),double.Parse);}
	public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}
	public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}
	public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}
	public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}
}