10
-405 -230 252 -393 -390 -259 97 163 81 -129
 3
10000 -10000 10000
 1
-10000
 20
-16 -23 29 44 -40 -50 -41 34 -38 30 -12 28 -44 -49 15 50 -28 38 -2 0

702.333333333333712
 10000.000000000016371
 0.000000000000000
 113.875000000000043

#include <bits/stdc++.h>
using namespace std;
int a[200009];
int n;
double f(double x) {
  double maxx = 0;
  double minn = 100000000;
  for (int i = 0; i <= n; i++) {
    maxx = max((double)maxx, a[i] - i * x);
    minn = min(double(minn), a[i] - i * x);
  }
  return maxx - minn;
}
double ternary_search(double l, double r) {
  if (r - l < 0.0000001) return l;
  double m1 = l + (r - l) / 3, m2 = r - (r - l) / 3;
  if (f(m1) < f(m2)) return ternary_search(l, m2);
  return ternary_search(m1, r);
}
int main() {
  cout << fixed << setprecision(7);
  cin >> n;
  a[0] = 0;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
    a[i] += a[i - 1];
  }
  cout << ternary_search(-10000, 10000) << "\n";
  double ans = f(ternary_search(-10000, 10000));
  cout << ans;
}
