# ny Miscellaneous

## Centroid decomposition

[Motivation](https://codeforces.com/problemset/problem/161/D): find all pairs of vertices in a graph which are excatly $$k$$ vertices from each other.

## Radius in graph

[Motivation](https://codeforces.com/contest/337/problem/D): find all vertices in a graph which can be in a radius of $$k$$ vertices from several vertices given.

## Hamiltonian path

## Eulerian path