func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(NULL);     int tc;     cin >> tc;     while (tc--) {       int arr[103][103];       long long cnt = 0;       int n, m;       cin >> n >> m;       for (int i = 1; i <= n; i++)         for (int j = 1; j <= m; j++) cin >> arr[i][j];       for (int i = 1; i <= n / 2; i++) {         vector<int> a;         for (int j = 1; j <= m / 2; j++) {           a.push_back(arr[i][j]);           a.push_back(arr[n + 1 - i][j]);           a.push_back(arr[i][m + 1 - j]);           a.push_back(arr[n + 1 - i][m + 1 - j]);           sort(a.begin(), a.end());           for (int tmp : a) cnt += abs(tmp - a[1]);           a.clear();         }         if (m % 2) cnt += abs(arr[i][m / 2 + 1] - arr[n + 1 - i][m / 2 + 1]);       }       if (n % 2) {         for (int j = 1; j <= m / 2; j++)           cnt += abs(arr[n / 2 + 1][j] - arr[n / 2 + 1][m + 1 - j]);       }       cout << cnt <<   n ;     }     return 0;   }   