func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, k;   long long ans;   long long matriz[505][505];   int main() {     ans = 0;     cin >> n >> k;     long long aux = (n - k + 1) * n;     aux = n * n - aux + 1;     long long curr1 = 1;     long long curr2 = aux;     for (int i = 0; i < n; ++i) {       int j = 0;       for (; j < k - 1; ++j) {         matriz[i][j] = curr1;         curr1++;       }       ans += curr2;       matriz[i][j] = curr2;       curr2++;       j++;       for (; j < n; ++j) {         matriz[i][j] = curr2;         curr2++;       }     }     cout << ans << endl;     for (int i = 0; i < n; ++i) {       for (int j = 0; j < n - 1; ++j) {         cout << matriz[i][j] <<    ;       }       cout << matriz[i][n - 1] << endl;     }     return 0;   }   