Editorial for COCI '22 Contest 2 #2 Ekspert
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
Suppose . The product
can be represented as the sum of at most
numbers. We can do that in the following way:
for each
where the
position in the binary representation of
is
.
For example:
Such a solution uses at most operations:
for storing the result in a register, and
for auxiliary operations.
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