void getCofactor(int A[N][N], int temp[N][N], int p, int q, int n){
  int i = 0, j = 0;
  for (int row = 0; row < n; row++){
    for (int col = 0; col < n; col++){
      if (row != p && col != q){
        temp[i][j++] = A[row][col];
        if (j == n - 1){
          j = 0;
          i++;
        }
      }
    }
  }
}