func_code_string: /* cerberus97 - Hanit Banga */      #include <iostream>   #include <iomanip>   #include <cassert>   #include <cmath>   #include <cstdio>   #include <cstring>   #include <cstdlib>   #include <map>   #include <set>   #include <queue>   #include <stack>   #include <vector>   #include <algorithm>   #include <numeric>      using namespace std;      #define pb push_back   #define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL)      typedef long long ll;   typedef long double ld;   typedef pair <int, int> pii;   typedef pair <ll, ll> pll;      const int N = 1e5 + 10;      int main() {    fast_cin();    int t; cin >> t;    while (t--) {     int n; cin >> n;     vector<ll> d(n);     for (auto& i : d) {      cin >> i;     }     sort(d.begin(), d.end());     ll ans = d[n - 1];     for (int i = 0; i < n; ++i) {      ans += d[i] * (n - 1 - 2 * i);     }     cout << ans <<   n ;    }   }