Vrijeme: 23:15

From Sweden, with love #3

U starom dvorcu kraljevska staklarica izrađuje novi prozor za dvoranu s prijestoljem. Raspoređuje deset ljubičastih i šest žutih stakala u mrežu 4\times4 tako da nijedna dva stupca i nijedna dva retka nemaju jednak broj žutih stakala. Na koliko načina to može učiniti?
In the old castle, the royal glassmaker is crafting a new window for the throne room. She arranges ten purple and six yellow glass panes in a 4\times4 grid such that no two columns and no two rows have the same number of yellow panes. In how many ways can she do this?