Vrijeme: 23:14

Minimum #4

U grupi od 2021 ljudi, 1400 su iritantni. Kristijan voli zabavu te želi imati idealan izlazak s točno troje drugih ljudi. Kristijan od tih 2021 ljudi bira troje no zna da ukoliko je barem jedna od tih osoba iritantna, izlazak mu neće biti idealan. Kristijan želi pronaći jednu iritantnu osobu te svake noći izabere troje ljudi i izađe s njima van. Koliko minimalno noći Kristijan mora izaći da pronađe tu osobu?
In a group of 2021 people, 1400 are irritating. Kristijan likes fun and wants to have an ideal night out with exactly three other people. Kristijan out of the 2021 people picks three but knows that if at least one of them is irritating, his night out will not be ideal. Kristijan wants to finds an irritating person and each night picks three people and goes out with them. What is the minimal amount of nights that Kristijan needs to go out to find that person?