#include <bits/stdc++.h>

using namespace std;

int main() {
	int n;
	cin >> n;
	vector<int> pos(n / 2);
	for (int i = 0; i < n / 2; ++i)
		cin >> pos[i];
	sort(pos.begin(), pos.end());
	
	int ans1 = 0, ans2 = 0;
	for (int i = 0; i < n / 2; ++i) {
		ans1 += abs(pos[i] - (i * 2 + 1));
		ans2 += abs(pos[i] - (i * 2 + 2));
	}
	
	cout << min(ans1, ans2) << endl;
	
	return 0;
}

#include <bits/stdc++.h>

using namespace std;

int main() {
	int n, m;
	cin >> n >> m;
	vector<string> s(n);
	vector<int> cnt(m);
	for (int i = 0; i < n; ++i) {
		cin >> s[i];
		for (int j = 0; j < m; ++j)
			if (s[i][j] == '1') ++cnt[j];
	}
	
	for (int i = 0; i < n; ++i) {
		bool ok = true;
		for (int j = 0; j < m; ++j) {
			if (s[i][j] == '1' && cnt[j] == 1)
				ok = false;
		}
		if (ok) {
			puts("YES");
			return 0;
		}
	}
	
	puts("NO");
	
	return 0;
}

#include<bits/stdc++.h>

using namespace std;

#define fore(i, l, r) for(int i = int(l); i < int(r); i++)

typedef long long li;

int n, k, l, m;
vector<li> a;

inline bool read() {
	if(!(cin >> n >> k >> l))
		return false;
	m = n * k;
	a.assign(m, 0);
	fore(i, 0, m)
		assert(scanf("%lld", &a[i]) == 1);
	return true;
}

inline void solve() {
	sort(a.begin(), a.end());
	int rg = int(upper_bound(a.begin(), a.end(), a[0] + l) - a.begin());
	
	if(rg < n) {
		puts("0");
		return;
	}
	li ans = 0;
	
	int u = 0;
	fore(i, 0, n) {
		ans += a[u++];
		
		fore(j, 0, k - 1) {
			if(rg - u > n - i - 1)
				u++;
			else
				break;
		}
	}
	cout << ans << endl;
}

int main() {
#ifdef _DEBUG
	freopen("input.txt", "r", stdin);
	int tt = clock();
#endif
	cerr << fixed << setprecision(15);
	
	if(read()) {
		solve();
	
#ifdef _DEBUG
		cerr << "TIME = " << clock() - tt << endl;
		tt = clock();
#endif
	}
	return 0;
}

#include <bits/stdc++.h>

#define forn(i, n) for (int i = 0; i < int(n); i++)

typedef long long li;

using namespace std;

const int INF = 2e9;
li n, h;

bool check(li maxh){
	li k = min(h, maxh);
	li cnt = maxh * maxh - k * (k - 1) / 2;
	return (cnt <= n);
}

li get(li maxh){
	li k = min(h, maxh);
	li cnt = maxh * maxh - k * (k - 1) / 2;
	li len = (2 * maxh - 1) - (k - 1);
	n -= cnt;
	return len + (n + maxh - 1) / maxh;
}

int main() {
	scanf("%lld%lld", &n, &h);
	li l = 1, r = INF;
	
	while (l < r - 1){
		li m = (l + r) / 2;
		
		if (check(m))
			l = m;
		else
			r = m;
	}
	
	printf("%lld\n", check(r) ? get(r) : get(l));
	return 0;
}

#include <bits/stdc++.h>
 
using namespace std;
 
#define forn(i, n) for(int i = 0; i < int(n); i++) 

const int N = 500 * 1000 + 13;

int f[N];

void upd(int x){
    for (int i = x; i < N; i |= i + 1)
        ++f[i];
}

int sum(int x){
    int res = 0;
    for (int i = x; i >= 0; i = (i & (i + 1)) - 1)
        res += f[i];
    return res;
}

int get(int l, int r){
	if (l > r) return 0;
	return sum(r) - sum(l - 1);
}

int main(){
	int n, k, dif;
	scanf("%d%d%d", &n, &k, &dif);
	vector<int> a(n);
	forn(i, n)
		scanf("%d", &a[i]);
	sort(a.begin(), a.end());
	
	vector<int> dp(n + 1, 0);
	
	dp[0] = 1;
	upd(0);
	
	int l = 0;
	forn(i, n){
		while (l < i && a[i] - a[l] > dif)
			++l;
		dp[i + 1] = (get(l, i - k + 1) >= 1);
		if (dp[i + 1]) upd(i + 1);
	}
	
	puts(dp[n] ? "YES" : "NO");
}

#include <bits/stdc++.h>

#define fore(i, l, r) for(int i = int(l); i < int(r); i++)
#define sz(a) int(a.size())

#define x first
#define y second

using namespace std;

const int B = 2;

typedef array<int, B> ht;

ht MOD, BASE;

inline int norm(int a, const int &MOD) {
	while(a >= MOD)
		a -= MOD;
	while(a < 0)
		a += MOD;
	return a;
}

inline int mul(int a, int b, const int &MOD) {
	return int(a * 1ll * b % MOD);
}

inline ht operator +(const ht &a, const ht &b) {
	ht ans;
	fore(i, 0, sz(ans))
		ans[i] = norm(a[i] + b[i], MOD[i]);
	return ans;
}

inline ht operator -(const ht &a, const ht &b) {
	ht ans;
	fore(i, 0, sz(ans))
		ans[i] = norm(a[i] - b[i], MOD[i]);
	return ans;
}

inline ht operator *(const ht &a, const ht &b) {
	ht ans;
	fore(i, 0, sz(ans))
		ans[i] = mul(a[i], b[i], MOD[i]);
	return ans;
}

int CMODS[] = {int(1e9) + 7, int(1e9) + 9, int(1e9) + 21, int(1e9) + 33, int(1e9) + 87, int(1e9) + 93, int(1e9) + 97, int(1e9) + 103};
int CBASE[] = {1009, 1013, 1019, 1021};

const int N = 200 * 1000 + 555;

int n, m;
char s[N];
int x[N], y[N], len[N];

inline bool read() {
	if(!(cin >> n >> m))
		return false;
	assert(scanf("%s", s) == 1);
	
	fore(i, 0, m) {
		assert(scanf("%d%d%d", &x[i], &y[i], &len[i]) == 3);
		x[i]--, y[i]--;
	}
	return true;
}
void setMods() {
	mt19937 rnd;
	unsigned int seed = n;
	fore(i, 0, n)
		seed = (seed * 3) + s[i];
	fore(i, 0, m) {
		seed = (seed * 3) + x[i];
		seed = (seed * 3) + y[i];
		seed = (seed * 3) + len[i];
	}
	rnd.seed(seed);
	
	set<int> mids;
	while(sz(mids) < sz(MOD))
		mids.insert(rnd() % 8);
	vector<int> vmids(mids.begin(), mids.end());
	fore(i, 0, sz(MOD)) {
		MOD[i] = CMODS[vmids[i]];
		BASE[i] = CBASE[i];
	}
}

ht pBase[N];
ht ph[27][N];
vector<int> ord[N];

ht getHash(int id, int l, int r) {
	return ph[id][r] - ph[id][l] * pBase[r - l];
}

inline void solve() {
	setMods();
	
	pBase[0] = {1, 1};
	fore(i, 1, N)
		pBase[i] = pBase[i - 1] * BASE;
		
	fore(c, 0, 26) {
		ph[c][0] = {0, 0};
		fore(i, 0, n) {
			int val = (s[i] == c + 'a');
			ph[c][i + 1] = ph[c][i] * BASE + ht{val, val};
		}
	}
	
	vector<int> curOrd(26, 0);
	iota(curOrd.begin(), curOrd.end(), 0);
	for(int i = n - 1; i >= 0; i--) {
		ord[i] = curOrd;
		auto it = find(ord[i].begin(), ord[i].end(), int(s[i] - 'a'));
		ord[i].erase(it);
		ord[i].insert(ord[i].begin(), int(s[i] - 'a'));
		curOrd = ord[i];
	}
	
	fore(q, 0, m) {
		int s1 = x[q], s2 = y[q];
		bool ok = true;
		
		fore(i, 0, 26) {
			if(getHash(ord[s1][i], s1, s1 + len[q]) != 
				getHash(ord[s2][i], s2, s2 + len[q])) {
				ok = false;
				break;
			}
		}
		puts(ok ? "YES" : "NO");
	}
}

int main(){
#ifdef _DEBUG
	freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
#endif
	if(read()) {
		solve();
	}
	return 0;
}

#include <bits/stdc++.h>

#define fore(i, l, r) for(int i = int(l); i < int(r); i++)
#define sz(a) int(a.size())

using namespace std;

typedef unsigned long long uli;

const int N = 200 * 1000 + 555;

int n, m;
uli a, b, c;
vector<int> g[N];

inline bool read() {
	if(!(cin >> n >> m))
		return false;
	assert(cin >> a >> b >> c);
	fore(i, 0, m) {
		int u, v;
		assert(scanf("%d%d", &u, &v) == 2);
		
		g[u].push_back(v);
		g[v].push_back(u);
	}
	return true;
}

vector<uli> ps[N];

inline uli getSum(int v, int l, int r) {
	return ps[v][r] - ps[v][l];
}

const int MX = 700;
int id[N];

const int B = 1111;
bitset<N> has[B];
int szh = 0;

inline void solve() {
	memset(id, -1, sizeof id);
	szh = 0;
	fore(v, 0, n) {
		sort(g[v].begin(), g[v].end());
		
		ps[v].assign(sz(g[v]) + 1, 0);
		fore(i, 0, sz(g[v]))
			ps[v][i + 1] = ps[v][i] + g[v][i];
		
		if(sz(g[v]) >= MX) {
			assert(szh < B);
			id[v] = szh++;
			
			for(int to : g[v])
				has[id[v]][to] = 1;
		}
	}
	
	uli all = 0;
	fore(v, 0, n) {
		uli lw = v, gr = n - v - 1;
		all += a * v * (gr * (gr - 1) / 2);
		all += b * v * (lw * gr);
		all += c * v * (lw * (lw - 1) / 2);
	}
	
	uli sub1 = 0;
	fore(v, 0, n) {
		for(int to : g[v]) {
			if(to > v)
				break;
			
			uli cnt = to;
			uli sum = cnt * (cnt - 1) / 2;
			sub1 += a * sum + cnt * (b * to + c * v);
			
			cnt = v - to - 1;
			sum = (2 * to + cnt + 1) * cnt / 2;
			sub1 += b * sum + cnt * (a * to + c * v);
		}
		
		uli sum = 0;
		fore(i, 0, sz(g[v])) {
			if(g[v][i] > v)
				break;
			
			uli cnt = i;
			sub1 -= a * sum + cnt * (b * g[v][i] + c * v);
			sum += g[v][i];
		}
	}
	all -= sub1;
	
	uli sub2 = 0;
	uli cntE = 0, sumE = 0;
	fore(v, 0, n) {
		sub2 += sumE + cntE * c * v;
		for(int to : g[v]) {
			if(to > v)
				break;
			
			cntE++;
			sumE += a * to + b * v;
		}
	}
	
	fore(v, 0, n) {
		for(int to : g[v]) {
			if(to > v)
				break;
			
			int pos = int(lower_bound(g[to].begin(), g[to].end(), to) - g[to].begin());
			sub2 -= a * getSum(to, 0, pos) + pos * (b * to + c * v);
			
			int pos2 = int(lower_bound(g[to].begin(), g[to].end(), v) - g[to].begin());
			sub2 -= b * getSum(to, pos, pos2) + (pos2 - pos) * (a * to + c * v);
		}
	}
	
	vector<char> curh(n + 5, 0);
	fore(v, 0, n) {
		if(id[v] == -1) {
			fore(i2, 0, sz(g[v])) {
				int u2 = g[v][i2];
				if(u2 > v)
					break;
				
				if(id[u2] != -1) {
					fore(i1, 0, i2) {
						int u1 = g[v][i1];
						if(has[id[u2]][u1])
							sub2 += a * u1 + b * u2 + c * v;
					}
				} else {
					for(int to : g[u2]) {
						if(to > u2)
							break;
						curh[to] = 1;
					}
					fore(i1, 0, i2) {
						int u1 = g[v][i1];
						if(curh[u1])
							sub2 += a * u1 + b * u2 + c * v;
					}
					for(int to : g[u2]) {
						if(to > u2)
							break;
						curh[to] = 0;
					}
				}
			}
		} else {
			fore(u2, 0, v) {
				if(!has[id[v]][u2])
					continue;
				for(int u1 : g[u2]) {
					if(u1 > u2)
						break;
					if(has[id[v]][u1])
						sub2 += a * u1 + b * u2 + c * v;
				}
			}
		}
	}
	all -= sub2;
	cout << all << endl;
}

int main(){
#ifdef _DEBUG
	freopen("input.txt", "r", stdin);
	int tt = clock();
#endif
	cout << fixed << setprecision(10);

	if(read()) {
		solve();
#ifdef _DEBUG
		cerr << "TIME = " << clock() - tt << endl;
#endif
	}
	return 0;
}