How to recursively delete two equal elements from a string?

Decode a string recursively encoded as count followed by substring. 22, Jun 17. ... Count of binary strings of length N having equal count of 0's and 1's and count of 1's ≥ count of 0's in each prefix substring. 25, Jul 20 ... Check if a string can be split into two substrings such that one substring is a substring of the other. 23, Dec 20 ... Recursion (adjective: recursive) occurs when a thing is defined in terms of itself or of its type.Recursion is used in a variety of disciplines ranging from linguistics to logic.The most common application of recursion is in mathematics and computer science, where a function being defined is applied within its own definition. While this apparently defines an infinite number of instances ... You are given two balanced binary search trees e.g., AVL or Red-Black Tree. Write a function that merges the two given balanced BSTs into a balanced binary search tree. Let there be m elements in the first tree and n elements in the other tree. Your merge function should take O(m+n) time. In the ...

2021.12.06 12:43 hero46it How to recursively delete two equal elements from a string?

Hello everyone.
I'm pretty new to Python and still learning. Trying to do some practice I came across this kind of exercise which I can't think about a solution that has sense to me.
Let's say we have a string like "3 0 1 3 2 2 1 3". The goal is to recursively remove couples of same elements. The process should be like:
Step 1 - "0 1 2 2 1 3", "3 0 1 2 2 1", "3 0 3 2 2 3"...
Step 2 - "0 2 2 3", "0 1 1 3", "3 0 2 2"...
Step 3 - "0 3", "0 3", "3 0"...
I can think of a (very complex) set of loops but with recursion I can't think neither where to start.
Any suggestion? Thanks.
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