Every time person phones person , tells everything that knows, while tells nothing. What is the minimum number of phone calls between pairs of people needed for everyone to know everything? Prove your answer is a minimum.
Iga kord, kui isik Loomulik isik , ütleb kõike teab, samas ütleb mitte midagi. Milline on minimaalne arv telefonikõnede vahel paari inimest vaja kõigile kõike teadma? Toesta, teie vastus on minimaalne.