JBTST III 2007, Problema 3

Moderators: Laurian Filip, Filip Chindea, maky, Cosmin Pohoata

Post Reply
User avatar
Laurian Filip
Site Admin
Posts: 344
Joined: Sun Nov 25, 2007 2:34 am
Location: Bucuresti/Arad
Contact:
Contact Laurian Filip

JBTST III 2007, Problema 3

Post by Laurian Filip »

Se considera o tabla n x n avand patratele unitate colorate arbitrar in alb si negru, astfel incat exact trei din patratele situate in colturi sunt colorate in alb iar al patrulea in negru. Sa se arate ca exista un patrat 2 x 2 ce contine un numar impar de patrate unitate colorate in alb.
Top
Post Reply

Return to “Combinatorica”