case of n = 2 handled separately
if ( n == 2 ) : NEW_LINE INDENT print ( - 1 ) NEW_LINE DEDENT else : NEW_LINE INDENT b = n * n // 4 - 1 NEW_LINE c = n * n // 4 + 1 NEW_LINE print ( " b ▁ = " , b " , ▁ c ▁ = " , c ) NEW_LINE DEDENT