what numbers is test 3 please could someone tell me?
zviadi Sorry, but this information is not disclosed.
what does it mean "uninterrupted water supply throughout the city" ?
zviadi This means that there must be a vertex from which, after the operation is performed, water can flow to all other vertices.
please could someone explain first example? which vertex edges they reversed???
zviadi the operation will be performed at vertex 4, then it will be possible to reach all the others from there
