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Basically a direct implementation of the (fixed) formula given in the challenge.
with(Math)f=n=>min(...[81,27,9,6,5,3,2,1].map((v,i)=>ceil(log(n/v)/log(4))*5-~(37115839>>i*4&1537115838>>i*4&15)))
Try it online!Try it online!
Basically a direct implementation of the formula given in the challenge.
with(Math)f=n=>min(...[81,27,9,6,5,3,2,1].map((v,i)=>ceil(log(n/v)/log(4))*5-~(37115839>>i*4&15)))
Try it online!
with(Math)f=n=>min(...[81,27,9,6,5,3,2,1].map((v,i)=>ceil(log(n/v)/log(4))*5-~(37115838>>i*4&15)))
