Editorial for DMOPC '18 Contest 5 P2 - A Photography Problem
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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.
Author:
Notice that the average brightness increases with an increase in . Thus, we can binary search for the
that would make the average brightness equal to
. The maximum value
can take is
(when all pixel brightnesses are
).
Time Complexity:
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