But the distinction is meaningless. A data structure is just a collection of algorithms for working on underlying memory. More complex algorithms are built with

But the distinction is meaningless. A data structure is just a collection of algorithms for working on underlying memory. More complex algorithms are built with simpler algorithms as building blocks. With that in mind, it essentially boils down to picking algorithms which when put together allows solving the problem in an as easy way as possible. Which of course is self evident. Though I suppose it doesn't hurt to remind people to step back and look at the full picture.