Editorial for LCC '21 Contest 4 S5 - The End of Art Academy
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:
Use a lazy segment tree and precompute the sum of all from
to
for all
from
to
to perform lazy updates in
.
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