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 main() {
  int n;
  cin >> n;
  double total = 0;
  vector<double> input(n);
  for (int i = 0; i < n; ++i) {
    cin >> input[i];
    total += input[i];
  }
  double average = total / n;
  for (int i = 0; i < n; ++i) {
    input[i] -= average;
  }
  double ans = -10000, pos_sum = 0, neg_sum = 0;
  int i = 0;
  while (i != n) {
    if (input[i] > 0) {
      if (input[i - 1] <= 0) {
        ans = max(neg_sum, ans);
        neg_sum = 0;
      }
      pos_sum += input[i];
      ans = max(pos_sum, ans);
    }
    if (input[i] < 0) {
      if (input[i - 1] >= 0) {
        ans = max(pos_sum, ans);
        pos_sum = 0;
      }
      neg_sum += abs(input[i]);
      ans = max(neg_sum, ans);
    }
    ++i;
  }
  cout << ans;
}
