#line 1 "test/yukicoder/1077.test.cpp"
#define PROBLEM "https://yukicoder.me/problems/no/1077"
#line 2 "template.hpp"
// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")

#include <bits/stdc++.h>
using namespace std;
// https://xn--kst.jp/blog/2019/08/29/cpp-comp/
// debug methods
// usage: debug(x,y);
// vector 出力できるように修正
template <typename T>
ostream& debug_print(ostream& os, const vector<T>& v) {
    os << "[";
    for (size_t i = 0; i < v.size(); ++i) {
        os << v[i];
        if (i < v.size() - 1) os << ", ";
    }
    os << "]";
    return os;
}
template <typename T>
ostream& debug_print(ostream& os, const T& var) {
    os << var;
    return os;
}
#define CHOOSE(a) CHOOSE2 a
#define CHOOSE2(a0, a1, a2, a3, a4, x, ...) x
#define debug_1(x1) { cout << #x1 << ": "; debug_print(cout, x1) << endl; }
#define debug_2(x1, x2) { cout << #x1 << ": "; debug_print(cout, x1) << ", " << #x2 << ": "; debug_print(cout, x2) << endl; }
#define debug_3(x1, x2, x3) { cout << #x1 << ": "; debug_print(cout, x1) << ", " << #x2 << ": "; debug_print(cout, x2) << ", " << #x3 << ": "; debug_print(cout, x3) << endl; }
#define debug_4(x1, x2, x3, x4) { cout << #x1 << ": "; debug_print(cout, x1) << ", " << #x2 << ": "; debug_print(cout, x2) << ", " << #x3 << ": "; debug_print(cout, x3) << ", " << #x4 << ": "; debug_print(cout, x4) << endl; }
#define debug_5(x1, x2, x3, x4, x5) { cout << #x1 << ": "; debug_print(cout, x1) << ", " << #x2 << ": "; debug_print(cout, x2) << ", " << #x3 << ": "; debug_print(cout, x3) << ", " << #x4 << ": "; debug_print(cout, x4) << ", " << #x5 << ": "; debug_print(cout, x5) << endl; }

#ifdef LOCAL
#define debug(...) CHOOSE((__VA_ARGS__, debug_5, debug_4, debug_3, debug_2, debug_1, ~))(__VA_ARGS__)
#else
#define debug(...)
#endif

using ll = long long;
using vl = vector<ll>;
using Graph = vector<vector<ll>>;
using P = pair<ll, ll>;
#define all(v) v.begin(), v.end()
template <typename T> inline bool chmax(T &a, T b) {
    return ((a < b) ? (a = b, true) : (false));
}
template <typename T> inline bool chmin(T &a, T b) {
    return ((a > b) ? (a = b, true) : (false));
}
#define rep1(i, n) for(ll i = 1; i <= ((ll)n); ++i)
// https://trap.jp/post/1224/
template <class... T> constexpr auto min(T... a) {
    return min(initializer_list<common_type_t<T...>>{a...});
}
template <class... T> constexpr auto max(T... a) {
    return max(initializer_list<common_type_t<T...>>{a...});
}
template <class... T> void input(T &...a) { (cin >> ... >> a); }
template <class T> void input(vector<T> &a) {
    for(T &x : a)
        cin >> x;
}
void print() { cout << '\n'; }
template <class T, class... Ts> void print(const T &a, const Ts &...b) {
    cout << a;
    (cout << ... << (cout << ' ', b));
    cout << '\n';
}
template <class Container, typename = void>
struct is_container : std::false_type {};
template <class Container>
struct is_container<Container, std::void_t<decltype(std::declval<Container>().begin()), decltype(std::declval<Container>().end())>> : std::true_type {};
template <class Container>
typename enable_if<is_container<Container>::value>::type print(const Container& x) {
    if (!x.empty()) {
        auto it = x.begin();
        for (; it != prev(x.end()); ++it) {
            cout << *it << " ";
        }
        cout << *it << "\n";  // 最後の要素を出力して改行
    }
}
#define INT(...)                                                               \
    int __VA_ARGS__;                                                           \
    input(__VA_ARGS__)
#define LL(...)                                                                \
    long long __VA_ARGS__;                                                     \
    input(__VA_ARGS__)
#define STR(...)                                                               \
    string __VA_ARGS__;                                                        \
    input(__VA_ARGS__)
#define REP1(a) for(ll i = 0; i < a; i++)
#define REP2(i, a) for(ll i = 0; i < a; i++)
#define REP3(i, a, b) for(ll i = a; i < b; i++)
#define REP4(i, a, b, c) for(ll i = a; i < b; i += c)
#define overload4(a, b, c, d, e, ...) e
#define rep(...) overload4(__VA_ARGS__, REP4, REP3, REP2, REP1)(__VA_ARGS__)

ll inf = 3e18;
vl dx = {1, -1, 0, 0};
vl dy = {0, 0, 1, -1};
#line 3 "data_structure/slope-trick.hpp"
// https://maspypy.com/slope-trick-1-%E8%A7%A3%E8%AA%AC%E7%B7%A8
// https://ei1333.github.io/library/structure/others/slope-trick.hpp
struct SlopeTrick {
    multiset<ll> L, R;
    ll min_f;
    ll add_L, add_R;
    SlopeTrick() {
        L = {-inf};
        R = {inf};
        add_L = add_R = min_f = 0;
    }
    ll size() { return ssize(L) + ssize(R); }
    // add \____
    // f(x) <- f(x) + max(a-x,0)
    void add_a_minus_x(ll a) {
        ll r0 = *begin(R);
        min_f += max(0LL, a - (r0 + add_R));
        R.insert(a - add_R);
        auto itr = begin(R);
        L.insert(*itr + add_R - add_L);
        R.erase(itr);
    }
    // add ___/
    // f(x) <- f(x) + max(x-a,0)
    void add_x_minus_a(ll a) {
        ll l0 = *L.rbegin();
        min_f += max(0LL, l0 + add_L - a);
        L.insert(a - add_L);
        auto itr = prev(end(L));
        R.insert(*itr + add_L - add_R);
        L.erase(itr);
    }
    // add \/
    // f(x) <- f(x) + |x-a|
    void add_abs(ll a) {
        add_a_minus_x(a);
        add_x_minus_a(a);
    }
    // f(x) <- f(x) + a
    void add_all(ll a) { min_f += a; }
    // f(x) = min_f をとる閉区間[l,r]
    P min_range() { return P(*rbegin(L) + add_L, *begin(R) + add_R); }
    // f(x) <- f(x) + g(x)
    void merge(SlopeTrick &g) {
        min_f += g.min_f;
        for(auto l : g.L) {
            if(l == -inf)
                continue;
            add_a_minus_x(l + g.add_R);
        }
        for(auto r : g.R) {
            if(r == inf)
                continue;
            add_x_minus_a(r + g.add_L);
        }
    }
    // https://maspypy.com/slope-trick-1-%E8%A7%A3%E8%AA%AC%E7%B7%A8#toc18:~:text=%E3%81%B0%E3%82%88%E3%81%84%E3%81%A7%E3%81%99%E3%80%82-,%E3%82%B9%E3%83%A9%E3%82%A4%E3%83%89%E6%9C%80%E5%B0%8F%E5%80%A4%E9%96%A2%E6%95%B0,-%EF%BC%9A
    // f(x) <- min[x-b <= y <= x-a]f(y)
    // \./ -> \_/
    void shift(ll a, ll b) {
        assert(a <= b);
        add_L += a;
        add_R += b;
    }
    // f(x) <- f(x-a)
    void shift(ll a) { shift(a, a); }
    ll get(ll a) {
        ll res = min_f;
        for(auto l : L) {
            res += max(0LL, l + add_L - a);
        }
        for(auto r : R) {
            res += max(0LL, a - (r + add_R));
        }
        return res;
    }
    // \__/ -> \___
    // f(x) <- min[y<=x]f(y)
    void clear_right() { R = {inf}; }
    // \__/ -> __/
    // f(x) <- min[y>=x]f(y)
    void clear_left() { L = {inf}; }
};
#line 3 "test/yukicoder/1077.test.cpp"
void solve() {
    LL(n);
    SlopeTrick st;
    while(n--) {
        LL(y);
        st.clear_right();
        st.add_abs(y);
    }
    print(st.min_f);
}
int main() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    ll t = 1;
    rep(_, t) solve();
}