#include <bits/stdc++.h>
#include <atcoder/all>
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
namespace mp = boost::multiprecision;
using Bint = mp::cpp_int;
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    int n;
    cin >> n;
    vector<int> a(n);
    rep(i,n) cin >> a[i];
    sort(a.begin(),a.end());
    vector<int> ng, p;
    rep(i,n) if(a[i]<0) ng.push_back(a[i]);
    rep(i,n) if(a[i]>=0) p.push_back(a[i]);
    if(ng.size()==0) {
        cout << a.back()-a.front() << endl;
    }
    else if(ng.size()==1) {
        cout << -ng.front() + a.back() << endl;
    }
    else if(ng.size()==n) {
        ll tmp = -ng[0] - ng[1];
        for(int i=2;i<ng.size();i++) tmp += -2*ng[i];
        cout << tmp << endl;
    }
    else {
        ll ans = 1e18;
        // n, p, n
        ll tmp = -ng[0] - ng[1];
        for(int i=2;i<ng.size();i++) tmp += -2*ng[i];
        tmp += 2*a.back();
        ans = min(ans,tmp);
        dbg(tmp);
        // n, p
        tmp = -ng[0];
        for(int i=1;i<ng.size();i++) tmp += -2*ng[i];
        tmp += a.back();
        ans = min(ans,tmp);
        dbg(tmp);

        // p, n
        tmp = 2*p.back()-p[0];
        tmp += -ng[0];
        for(int i=1;i<ng.size();i++) tmp += -2*ng[i];
        ans = min(ans,tmp);
        dbg(tmp);

        cout << ans << endl;
    }
    return 0; 
}