#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    int n;
    cin >> n;

    int dp[10001] = {};

    for (int i = 0; i < n; i++) {
        int y;
        cin >> y;

        int t = 1 << 30;
        for (int j = 0; j <= 10000; j++) {
            t = min(t, dp[j]);
            dp[j] = t + abs(j - y);
        }
    }

    int r = 1 << 30;
    for (int j = 0; j <= 10000; j++) {
        r = min(r, dp[j]);
    }
    cout << r << endl;

    return 0;
}