Vrijeme: 18:30
Ukrainski lanac | Ukraine chain #5
Nakon što mu dosadi igranje šaha ili video igrica, Taras se vraća crtanju i bojanju: nečemu u čemu istinski uživa. Postoji ploča od , koju želi obojiti uz pomoć četiri moguće boje: plave, žute, crne i bijele. On bojanje naziva različitim ako su četiri ćelije bilo kojeg kvadrata od na ploči obojane u parovima različitih boja. Odredite broj svih različitih boja na ploči koju ima.
After getting bored with playing chess or video games, Taras get back to drawing and colouring: something he truly enjoys. There is a board, that he wants to colour with the help of four possible colors: blue, yellow, black and white. He calls a coloring diverse if the four cells of any square of the board are colored with pairwise different colors. Determine the number of all diverse colourings of the board he has.