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For those who are struggling solving this. At one time it took me about a week of work to solve this problem, may be longer. This is no way an easy thing, and I doubt the solution can be written as one function. Particularly, my solution contains near 600 lines and 17 helper functions.
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Project Euler #145: How many reversible numbers are there below one-billion?
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For those who are struggling solving this. At one time it took me about a week of work to solve this problem, may be longer. This is no way an easy thing, and I doubt the solution can be written as one function. Particularly, my solution contains near 600 lines and 17 helper functions.