Vrijeme: 23:15

Ploče | Boards #4

Na zaslonu računala prikazana je šahovska ploča dimenzija 98\times98, standardno obojana. Mišem se može odabrati bilo koji pravokutnik čije stranice leže na linijama šahovske ploče i kliknuti na tipku miša - pritom se boje unutar odabranog pravokutnika mijenjaju (crna postaje bijela, bijela postaje crna). Odredite najmanji broj klikova mišem potreban da cijela šahovska ploča poprimi jednu boju.
On a computer screen a chess board is shown of dimensions 98\times98 in the standard colouring. You can select with a mouse any rectangle whose sides lie on the lines of the chess board and click on the mouse, which will change the colours inside the rectangle (black turns white, white turns black). Find the least amount of clicks needed for the entire board to be coloured in a single colour.