#include <algorithm>
#include <iostream>
#include <numeric>
#include <string>
#include <tuple>
#include <utility>
#include <vector>

#define rep(i, a, b) for (int i = int(a); i < int(b); i++)
using namespace std;
using ll = long long int;
using P = pair<ll, ll>;

// clang-format off
#ifdef _DEBUG_
#define dump(...) do{ cerr << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; debug_print(__VA_ARGS__); } while(false)
template<typename T, typename... Ts> void debug_print(const T &t, const Ts &...ts) { cerr << t; ((cerr << ", " << ts), ...); cerr << endl; }
#else
#define dump(...) do{ } while(false)
#endif
template<typename T> vector<T> make_v(size_t a, T b) { return vector<T>(a, b); }
template<typename... Ts> auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v(ts...))>(a, make_v(ts...)); }
template<typename T> bool chmin(T &a, const T& b) { if (a > b) {a = b; return true; } return false; }
template<typename T> bool chmax(T &a, const T& b) { if (a < b) {a = b; return true; } return false; }
template<typename T, typename... Ts> void print(const T& t, const Ts&... ts) { cout << t; ((cout << ' ' << ts), ...); cout << '\n'; }
template<typename... Ts> void input(Ts&... ts) { (cin >> ... >> ts); }
template<typename T> istream &operator,(istream &in, T &t) { return in >> t; }
// clang-format on

#include <array>
template<typename T, typename... Index>
class FlatVector : public vector<T> {
private:
    array<size_t, sizeof...(Index)> args;

public:
    template<typename F>
    FlatVector(F &&init, Index... arg) : vector<T>((arg * ...), forward<T>(init)), args({static_cast<size_t>(arg)...}) {}
    T &idx(Index... arg) {
        array<size_t, sizeof...(Index)> _args = {static_cast<size_t>(arg)...};
        size_t index = 0;
        for (size_t i = 0; i < sizeof...(Index); i++) {
            index *= args[i];
            index += _args[i];
        }
        return this->operator[](index);
    }
};
template<typename T, typename... Index>
FlatVector(T, Index...) -> FlatVector<T, Index...>;

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int n;
    cin, n;
    vector<int> y(n);
    rep(i, 0, n) {
        cin, y[i];
    }
    ll inf = 1LL << 60;
    const int SZ = 10010;
    FlatVector dp(inf, n + 1, SZ);
    dp.idx(0, 0) = 0;

    rep(i, 0, n) {
        ll m = inf;
        rep(j, 0, SZ) {
            chmin(m, dp.idx(i, j));
            ll cost = m + abs(j - y[i]);
            chmin(dp.idx(i + 1, j), cost);
        }
    }
    ll ans = inf;
    rep(i, 0, SZ) {
        chmin(ans, dp.idx(n, i));
    }
    print(ans);

    return 0;
}