Convert Collatz Conjecture From String To Number And Back Using Python Pointers

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🏁MISSION:

Collatz Ztalloc by freeman_lex - 🚀Embark on a Mathematical Odyssey with the Collatz Conjecture in Binary! 🧮

Step into the captivating realm of Collatz, where numbers pirouette in a mesmerizing binary dance of "up" and "down" transitions. Your challenge: craft a Python function that decodes the starting value from strings of "u"s and "d"s or unveils the shape of steps from a given value. But beware! Not all shapes are plausible according to Collatz rules. Navigate this mathematical labyrinth with precision, ensuring your function rejects the impossible shapes and returns None. Are you ready to crack the code and unravel the mysteries of this captivating mathematical puzzle? Join the adventure now! 💫

collatz_convert("ududududddddudddd") == 15
collatz_convert(135) == "udududduddddududdudduddddudududdudddudddd"
collatz_convert("dudududdudddudddd") == 14

📖ARTICLE:

Does Python have pointers? - For your attention is informative and educational article from Ned Batchelder about author's understanding of pointers in Python in comparison with some other languages.

👩‍💻CODE SHOT:

How do you think, what the following code does?

def ??????????(arr: list[str]) -> str:
    p=arr[0]
    for t in arr[1:]:
        while not t.startswith(p):
            p=p[:-1]
    return p

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