In the "Arrows" puzzle, you need to place the arrows around the perimeter of the rectangular table so that all the numbers inside the table correspond to the number of arrows pointing at them.
To facilitate the task, an auxiliary lighting is provided. The number is highlighted in green if it corresponds to the number of arrows turned towards it, in red if it is less. When you click on a number, the blue frame denotes the arrows that are turned towards it, the gray one - that are turned away from it. A second click removes the selection.