func_code_string: #include <bits/stdc++.h>   using namespace std;   void init() {     ios::sync_with_stdio(0);     cin.tie(0);   }   int main() {     init();     int t;     cin >> t;     while (t--) {       int n, m;       cin >> n >> m;       long long arr[n][m];       for (int i = 0; i < n; i++) {         for (int j = 0; j < m; j++) {           cin >> arr[i][j];         }       }       long long ops = 0;       for (long long i = 0; i < n; i++) {         for (int j = 0; j < m; j++) {           long long a[4];           a[0] = arr[i][j];           a[1] = arr[n - 1 - i][m - 1 - j];           a[2] = arr[i][m - 1 - j];           a[3] = arr[n - 1 - i][j];           sort(a, a + 4);           long long m = (a[1] + a[2]) / 2;           for (int ii = 0; ii < 4; ii++) {             ops += abs(a[ii] - (m));           }         }       }       ops /= 4;       cout << ops << endl;     }   }   