the length of the rope is l units.
I can only cut any rope into two halves.

for example if the length of the rope is 8 and we need a length of
rope 6

we first cut into two halves and we get 4, 4
now we cut any of the half again and we get 4,2,2

now we can merge 4 and 2 and form a rope of length 6.

in this example we need a minimum of 2 cuts to get the length of rope
6 from 8

assume that l is always a power of 2 and we need always a even length
of rope from it how to find the number of minimum cuts needed to get
the new rope?.

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