case of n = 2 handled separately
if ( n == 2 ) Console . WriteLine ( - 1 ) ; else { b = n * n / 4 - 1 ; c = n * n / 4 + 1 ; Console . WriteLine ( " Side ▁ b ▁ = ▁ " + b + " , ▁ Side ▁ c ▁ = ▁ " + c ) ; } }