Formula method
Basic formula of pancake problem:
(1) number of pancakes = (number of pancakes ×2)/ number of pancakes at most (number of pancakes+1when there is surplus);
② Total time = number of times to be branded × branding time on each side.
Parity method
Instructions for use: When the number of cakes is even, you can bake 2 cakes and 2 cakes; When the number of cakes is odd, bake two cakes first, and bake the remaining three cakes with the best scheme of three cakes, with the least time.
Rounding method
Instructions for use: suppose a pot can fry m cakes at a time, and it takes a minute and b minutes to fry one side and two sides respectively. The minimum time to fry n cakes is: if n