Ilya and a Colorful Walk
Ilya lives in a beautiful city of Chordalsk. There are $n$ houses on the street Ilya lives, they are numerated from $1$ to $n$ from […]
Ilya
Ilya lives in a beautiful city of Chordalsk. There are $n$ houses on the street Ilya lives, they are numerated from $1$ to $n$ from […]