#include <bits/stdc++.h>
typedef long long i64;
using std::cout;
using std::endl;
using std::cin;

std::vector<double> a;
double n;

double cost(double b, double d) {
	double ret = 0.0;
	for(int i = 0; i < n; i++) {
		ret += (a[i] - b) * (a[i] - b);
		b += d;
	}
	
	assert(ret >= 0);
	return ret;
}

double solve_D(double b, double lim) {
	double left, right;
	if(b < 0) left = 0, right = lim;
	else left = -lim, right = lim;
	
	for(int i = 0; i < 150; i++) {
		double ml = (left + left + right) / 3.0;
		double mr = (left + right + right) / 3.0;
		
		if(cost(b, ml) <= cost(b, mr)) {
			right = mr;
		} else {
			left = ml;
		}
	}
	
	return (left + right) / 2.0;
}

double solve_B(double lim) {
	double left = -1e6, right = 1e6;
	
	for(int i = 0; i < 150; i++) {
		double ml = (left + left + right) / 3.0;
		double mr = (left + right + right) / 3.0;
		
		if(cost(ml, solve_D(ml, lim)) <= cost(mr, solve_D(mr, lim))) {
			right = mr;
		} else {
			left = ml;
		}
	}
	
	return (left + right) / 2.0;
}	

int main(){
	cin >> n; a.resize(n);
	for(int i = 0; i < n; i++) cin >> a[i];
	
	double b = solve_B(1e5);
	double d = solve_D(b, 1e5);
	double c = cost(b, d);
	double B = solve_B(4e5);
	double D = solve_D(B, 4e5);
	double C = cost(B, D);
	cout << std::fixed << std::setprecision(16);
	if(c < C) cout << b << " " << d << endl << c << endl;
	else cout << B << " " << D << endl << C << endl;
	return 0;
}