#include <bits/stdc++.h>
#define _overload3(_1, _2, _3, name, ...) name
#define _rep(i, n) repi(i, 0, n)
#define repi(i, a, b) for (int i = (a); i < (b); ++i)
#define rep(...) _overload3(__VA_ARGS__, repi, _rep, )(__VA_ARGS__)
#define ALL(x) x.begin(), x.end()
#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)
using namespace std;
random_device rnd;
mt19937 mt(rnd());
using ll = long long;
using lld = long double;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using PII = pair<int, int>;
const int IINF = 1 << 30;
const ll INF = 1ll << 60;
const ll MOD = 1000000007;

int main()
{
    int n;
    cin >> n;
    vector<ll> v(n);
    rep(i, n) cin >> v[i];
    sort(ALL(v));
    ll a1 = 0, a2 = 0, b1 = 0, b2 = 0;

    rep(i, n)
    {
        if (i % 2)
        {
            a1 += v[i];
        }
        else
        {
            a2 += v[i];
        }
    }
    rep(i, n / 2)
    {
        b1 += v[i];
        b2 += v[n - 1 - i];
    }
    if (n % 2)
    {
        if (llabs(b1 + v[n / 2]) < llabs(b2 + v[n / 2]))
        {
            b2 += v[n / 2];
        }
        else
        {
            b1 += v[n / 2];
        }
    }
    a1 = llabs(a1);
    a2 = llabs(a2);
    b1 = llabs(b1);
    b2 = llabs(b2);
    if (a1 < a2)
        swap(a1, a2);
    if (b1 < b2)
        swap(b1, b2);
    cout << min(a1 - a2, b1 - b2) << endl;
}