Uber Senior Data Platform Engineer interview questions

Lift with n floors. You can go up by lift any number of floors and then climb up by stairs the remaining floors. Going by lift increases your energy by e1 per floor and uses t1 time per floor. Climbing by stairs decreases your energy by e2 per floor and uses ceil(c/E) time per floor, where c is a constant and E is your current energy. Find the minimum possible difference between the time taken in going by stairs and going by lift. Values of n, e1, t1, e2, c are given as part of the question.