/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2021.02.05 22:09:50
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    int n;cin >> n;
    vector<int> c(n);
    for (int i = 0; i < n; i++) {
        cin >> c[i];
    }
    sort(c.begin(), c.end());
    
    ll a = 0,b = 0;
    ll ans = 0;
    for (int i = 0; i < n; i++) {
        if (i & 1) {
            b += c[n-i-1];
        }
        else {
            a += c[n-i-1];
        }
    }
    ans = abs(a)-abs(b);
    a = 0, b = 0;
    for (int i = 0; i < n; i++) {
        if (i & 1) {
            b += c[i];
        }
        else {
            a += c[i];
        }
    }
    ans = max(ans,abs(a)-abs(b));
    cout << ans << endl;
    return 0;
}