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Any natural number N can be expressed as
1 + 1 + 1 + .... + 1 kilometers (x miles = 2x kilometers). So here's a question...
We know that any natural number can be expressed (not uniquely) as the sum of Fibonacci factors. Given a (potentially huge) natural number, how can you write it as the sum of Fibonacci factors so that the smallest factor is as large as possible?
e.g. for 6
6 = 1 + 5
6 = 2 + 2 + 2
6 = 1 + 2 + 3
6 = 1 + 1 + 2 + 2
6 = 3 + 3
6 = 3 + 3 is "best" since all other factorizations involve factors less than 3. Similarly, 11 = 5 + 3 + 3 or 11 = 8 + 3 both have smallest factor 3 (and I think you can't do better).
Brute force works for small numbers, but becomes hard for large ones. Any ideas?
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