AT_abc424_a [ABC424A] Isosceles

There is a triangle ABC with positive area. The lengths of the three sides of triangle ABC are $ a,b,c $ . Determine whether triangle ABC is isosceles.

The input is given from Standard Input in the following format: > $ a $ $ b $ $ c $

If triangle ABC is isosceles, output `Yes`; otherwise, output `No`.

### Sample Explanation 1 Since $ a=c $ , triangle ABC is isosceles. Thus, output `Yes`. ### Sample Explanation 2 Since the three side lengths of triangle ABC are all different, it is not isosceles. Thus, output `No`. ### Sample Explanation 3 Note that an equilateral triangle is a kind of isosceles triangle. ### Constraints - $ 1 \leq a,b,c \leq 10 $ - A triangle with side lengths $ a,b,c $ exists, and its area is positive. - $ a,b,c $ are integers.