#pragma GCC optimize ("O2")
#pragma GCC target ("avx2")
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep1(i, n) for(int i = 1; i <= (n); i++)
#define co(x) cout << (x) << "\n"
#define cosp(x) cout << (x) << " "
#define ce(x) cerr << (x) << "\n"
#define cesp(x) cerr << (x) << " "
#define pb push_back
#define mp make_pair
#define chmin(x, y) x = min(x, y)
#define chmax(x, y) x = max(x, y)
#define Would
#define you
#define please

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);


	int N;
	cin >> N;

	int Y[1001];
	rep(i, N) cin >> Y[i];

	int dp[1001][20000];
	rep(i, N + 1) rep(j, 11000) dp[i][j] = 1e9;
	dp[0][0] = 0;

	rep(i, N) {
		int saishou = 1e9;
		rep(j, 10001) {
			chmin(saishou, dp[i][j]);
			chmin(dp[i + 1][j], saishou + abs(Y[i] - j));
		}
	}
	co(*min_element(dp[N], dp[N] + 10001));

	Would you please return 0;
}