IMO Shortlist 1999 problem C5


Kvaliteta:
  Avg: 0,0
Težina:
  Avg: 8,0
Dodao/la: arhiva
2. travnja 2012.
LaTeX PDF
Let b be an even positive integer. We say that two different cells of a n \times n board are neighboring if they have a common side. Find the minimal number of cells on he n \times n board that must be marked so that any cell marked or not marked) has a marked neighboring cell.
Izvor: Međunarodna matematička olimpijada, shortlist 1999



Komentari:

Ispravak: Umjesto b treba biti n.

Zadnja promjena: PETARMAT, 9. veljače 2018. 20:51