You have six buckets all lined up in a row.
The first three are filled with rocks and the second three are empty, so the starting pattern is ‘full full full empty empty empty’.
You are only allowed to touch/move one bucket and for the one bucket you touch, you are only allowed to touch it one time.
How do you make it so that the order of the buckets becomes ‘full empty full empty full empty’?
Dump the rocks from the second bucket into the fifth and replace the bucket where it was?
Correct… that was a fast response!