Question 47
A gardener Andres wants to plant one currant bush to each cell of his garden of shape $24 \times 2024$. He wants to plant as many blackcurrant bushes as possible under the following conditions: There must be at least one redcurrant and at least one whitecurrant bush, and for any cell with a blackcurrant bush, cells that have a common side with it must contain equally many redcurrant and whitecurrant bushes (maybe also 0 of both). Find the largest number of blackcurrant bushes Andres can plant.