### Cow and Exercise

Farmer John is obsessed with making Bessie exercise more! Bessie is out grazing on the farm, which consists of $n$ fields connected by $m$ directed […]

### Cow and Vacation

Bessie is planning a vacation! In Cow-lifornia, there are $n$ cities, with $n-1$ bidirectional roads connecting them. It is guaranteed that one can reach any […]

### Two Regular Polygons

You are given two integers $n$ and $m$ ($m < n$). Consider a convex regular polygon of $n$ vertices. Recall that a regular polygon is a polygon […]