case of n = 1 handled separately
if ( n == 1 ) cout << -1 << endl ; else { b = ( n * n - 1 ) / 2 ; c = ( n * n + 1 ) / 2 ; cout << " Side ▁ b ▁ = ▁ " << b << " , ▁ Side ▁ c ▁ = ▁ " << c << endl ; } } else {