#include <bits/stdc++.h>

using namespace std;

using ll = long long;

constexpr char newl = '\n';

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int n;
    cin >> n;

    vector<int> dp(10001, 0);
    for (int i = 0; i < n; i++) {
        int y;
        cin >> y;

        int memo = 1e9;
        for (int j = 0; j <= 10000; j++) {
            memo = min(memo, dp[j] + abs(y - j));
            dp[j] = memo;
        }
    }

    cout << *min_element(dp.begin(), dp.end()) << newl;

    return 0;
}