/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.06.12 23:37:02
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    constexpr int INF = 1e9 + 6;
    vector<vector<int>> dp(n+1,vector<int>(10001,INF));
    dp[0][0] = 0;
    for (int i = 0; i < n; i++) {
        int m = INF;
        for (int j = 0; j <= 10000; j++) {
            m = min(m,dp[i][j]);
            dp[i + 1][j] = m + abs(a[i]-j);
        }
    }
    int ans = INF;
    for (int i = 0; i <= 10000; i++) {
        ans = min(ans,dp[n][i]);
    }
    cout << ans << endl;
    return 0;
}