Problem 60216. Perfect shuffle

We call "perfect shuffle" the process of cutting a deck of cards into two equal halves, and then perfectly interleaving them: one card from the left stack, one card from the right stack, one card from the left stack, and so on.
Let "deck" be an array with an even number of elements. Write a function "perfect_shuffle(deck)" that returns a new array constructed according to this shuffle.
For example, perfect_shuffle([1, 2, 3, 4, 5, 6]) should return [1, 4, 2, 5, 3, 6].
Remark: For an array of 1024 elements, after 10 shuffles, we get back to the initial arrangement.
Solve

Solution Stats

77.78% Correct | 22.22% Incorrect
Last Solution submitted on Nov 17, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers17

Suggested Problems

More from this Author53

Problem Tags

card game shuffle

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!