func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m;     cin >> n >> m;     vector<int> a[n];     for (int i = 0; i < n; i++) {       for (int j = 0; j < m; j++) {         int x;         cin >> x;         x--;         a[i].push_back(x);       }     }     int ans = 0;     for (int j = 0; j < m; j++) {       vector<int> cnt(n);       int c = 0;       for (int i = 0; i < n; i++) {         if (a[i][j] % m != j || a[i][j] / m > n)           c++;         else {           if (i >= a[i][j] / m)             cnt[i - a[i][j] / m]++;           else             cnt[i + n - a[i][j] / m]++;         }       }       int mn = 1e9;       for (int i = 0; i < n; i++) {         mn = min(mn, n - cnt[i] + i);       }       ans += mn;     }     cout << ans << endl;   }   