CF854A Fraction
Description
Petya is a big fan of mathematics, especially its part related to fractions. Recently he learned that a fraction  is called proper iff its numerator is smaller than its denominator ( $ a
Input Format
In the only line of input there is an integer $ n $ ( $ 3
Output Format
Output two space-separated positive integers $ a $ and $ b $ , numerator and denominator of the maximum possible proper irreducible fraction satisfying the given sum.