#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <iomanip>
#include <math.h> 
#include <stack>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <tuple>
#include <cctype>

using namespace std;


int main() {
	int i, j, k;
	bool flag[50] = { false };
	bool flag2[50] = { false };
	vector<int>a(50, 9999);
	vector<int>b(50, 9999);
	int n;

	cin >> n;

	for (i = 0; i < n; i++) {
		cin >> a[i];
	}

	sort(a.begin(), a.end());

	for (i = 1; i <= n; i++) {
		for (j = 0; j < n; j++) {
			if (a[j] == i) {
				flag[j] = true;
				flag2[i-1] = true;
				break;
			}
		}
	}

	int cnt = 0;

	for (i = 0; i < n; i++) {
		if (flag[i] == false) {
			b[cnt] = a[i];
			cnt++;
		}
	}

	sort(b.begin(), b.end() );

	int cnt2 = 0, sum = 0;

	for (i = 0; i < n; i++) {
		if (flag2[i] == false) {
			sum += abs( b[cnt2] - (i+1));
			cnt2++;
		}
	}

	cout << sum << endl;



	getchar();
	getchar();
	return 0;
}