MathDB

In a room there are

2023

vases numbered from

1

2023

. In each vase we want to put a note with a positive integer from

1

2

...

2023

on it. The numbers on the notes do not necessarily have to be distinct. The following should now apply to each vase. Look at the note inside the vase, find the (not necessarily different) vase with the number written on the note, and look at the note inside this vase. Then the average of the numbers on the two notes must be exactly equal to the number of the first selected vase. For example, if we put a note with the number

5

in vase

13

, then vase

5

should contain a note with the number

21

on it: after all, the average of

5

and

21

13

. Determine all possible ways to provide each vase with a note.

Problem Statement