Hopefully the drunken man succeeded. The derivative of drunkenness is when in the morning you give up the glass and continue to buckle for the money you earned. Drunkenness is called fundamental if the second derivative is not equal to zero :)
Profile: I have stumbled here. If you take a simple beer of 20 p. bottle and take a container of 1 p. then you need to buy 400 bottles of beer. The first derivative will be 20 bottles, the second derivative 1 bottle. If you drink first 8 bottles for 50 days, then 5 bottles for 4 days and another bottle for the last day. 8,000 r. and 55 days.