#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int n, sum = 0;
  cin >> n;
  vector<long long int> v;
  for (long long int i = 0; i < n; i++) {
    long long int el;
    cin >> el, sum += el;
    v.push_back(el);
  }
  sum = sum / n;
  long long int res = 0, curr = 0;
  for (long long int i = 0; i < n; i++) {
    curr += v[i] - sum;
    (curr > 0) ? res += curr : res -= curr;
  }
  cout << res;
  return 0;
}
