Negafibonacci Representations

Today I found this amazing question about representing numbers in negafibonacci over on Stack Overflow. The negafibonacci number system represents each integer as a sum of terms of the form (-1)^n F_n using only the digits 0 and 1. I played around with the problem a bit and found a really cool algorithm that efficiently converts numbers into negafibonacci by subdividing the integers into different ranges bounded by Fibonacci numbers and using those ranges to decide which bits to include.

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