c++ help, please

Question

The values of the variables X, Y, Z be reversed so that they are sorted in ascending order.

Answer 1

https://code.sololearn.com/cqfF14AkOwBv/#cpp
Let me know if you need an explanation :)

Answer 2

How was my code overcomplicated? It is the basic algorithm, for beginners. You are using a vector and a pre-made algorithm.