Editorial for CTU Open Contest 2018 - Escalators
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.
- Split the problem into
instances by bits.
- In
iteration, consider only nodes which have
on the
bit.
- Find sizes of components of ones (DFS).
- Each component adds
.
Complexity
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