Editorial for DMOPC '17 Contest 1 P1 - Fujō Neko
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.
Author:
For the first subtask, we can loop through the column and row
and check if there's an
X
.
Time Complexity:
For the second subtask, we can preprocess the grid and create two arrays, and
. Let
be true if there is an
X
on column and
be true if there is an
X
on row . To answer each query, we just check if
or
is true.
Time Complexity:
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