Road Repair in Treeland
There are $n$ cities and $n-1$ two-way roads in Treeland. Each road connects a pair of different cities. From any city you can drive to […]
Treeland
Modernization of Treeland
Treeland consists of $n$ cities and $n-1$ two-way roads connecting pairs of cities. From every city, you can reach every other city moving only by […]
