var n = 6, j,k;
var a = [
[27, 29,  2,  4, 13, 36],
[ 9, 11, 20, 22, 31, 18],
[32, 25,  7,  3, 21, 23],
[14, 16, 34, 30, 12,  5],
[28,  6, 15, 17, 26, 19],
[ 1, 24, 33, 35,  8, 10]],        
r = [0,0,0,0,0,0],
l = [0,0,0,0,0,0],
d = [0,0];

for (j = 0; j<n; j++)
{ d[0] +=a[j][j];
  d[1] +=a[j][n-j-1];
  for (k = 0; k<n; k++)
  { r[j] +=a[j][k];
    l[j] +=a[k][j];
  }
} 
var mag=(d[0]==d[1]);
for (j = 0; j<n; j++) { mag = (mag && (r[j]==d[0]) && (l[j]==d[0]));}
if (mag) print("Квадрат магічний.");
else     print("Квадрат не є магічним.");