case of n = 2 handled separately
if ( n == 2 ) System . out . println ( " - 1" ) ; else { int b = n * n / 4 - 1 ; int c = n * n / 4 + 1 ; System . out . println ( " b ▁ = ▁ " + b + " , ▁ c ▁ = ▁ " + c ) ; } } }