5 days.
Zhenggushui is a kind of external medicine, mainly used to treat bruises, fractures and dislocations and other symptoms. When applying bone-setting water, be careful to avoid contact with sensitive parts such as the eyes and mouth. At the same time, pay attention to keeping the local skin clean and dry to avoid infection.
Place all elements in the array that are less than or equal to 0 at the front of the array, and those greater than 0 at the back