code.cpp: In function 'int main()':
code.cpp:12:111: error: lvalue required as left operand of assignment
   12 |            if ( (j =  n - 1) || (j = 0) || (i = n - 1) || (i = 0) ||  (j = i && i != 0 && i != n - 1) || (abs (i - j) = n / 2) )
      |                                                                                                           ~~~~^~~~~~~