#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define DEBUG(...)
#endif

template <class T> constexpr T inf = numeric_limits<T>::max() / 2.1;

auto chmin = [](auto&& a, auto b) { return b < a ? a = b, 1 : 0; };

constexpr int lim = 1e4;

int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  int n;
  cin >> n;
  vector dp(lim + 1, 0);
  while (n--) {
    int a;
    cin >> a;
    vector ndp(lim + 1, inf<int>);
    int mn = inf<int>;
    for (int y = 0; y <= lim; ++y) {
      chmin(mn, dp[y]);
      ndp[y] = abs(y - a) + mn;
    }
    swap(dp, ndp);
  }
  cout << *min_element(begin(dp), end(dp)) << '\n';
}