#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
template <class T>
inline T read() {
  T x = 0, f = 1;
  char s = getchar();
  while (s < '0' || s > '9') {
    if (s == '-') f = -1;
    s = getchar();
  };
  while (s >= '0' && s <= '9') {
    x = (x << 3) + (x << 1) + s - 48;
    s = getchar();
  };
  return x * f;
}
template <typename T>
inline void wri(T x) {
  if (x < 0) {
    x = -x;
    putchar('-');
  };
  if (x / 10) wri(x / 10);
  putchar(x % 10 + 48);
}
template <typename T>
inline void print(T x, char s) {
  wri(x);
  putchar(s);
}
template <typename T>
T gcd(T a, T b) {
  return b == 0 ? a : gcd(b, a % b);
}
long long a[50050];
int n;
long long sum = 0;
long long ans;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0), cout.tie(0);
  cin >> n;
  for (auto i = (1); i < (n + 1); i++) {
    cin >> a[i];
    sum += a[i];
  }
  long long avg = sum / n;
  for (auto i = (1); i < (n + 1); i++) {
    if (a[i] == avg) {
      continue;
    } else if (a[i] > avg) {
      long long delta = a[i] - avg;
      ans += delta;
      a[i + 1] += delta;
    } else if (a[i] < avg) {
      long long delta = avg - a[i];
      ans += delta;
      a[i + 1] -= delta;
    }
  }
  cout << ans << endl;
  return 0;
}
