Given $n$ rational numbers. Every time you can delete $2$ numbers, and add 2 numbers which are equal to $\frac{a+b}{2}$ (assume the number you delete is $a$ and $b$). How to judge whether it is possible to make these $n$ numbers equal in finite steps? If possible, how to construct it?
2026-03-28 07:25:04.1774682704
Make n numbers equal
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