Given an array temperatures of daily temperatures, return an array answer such that answer[i] is the number of days you must wait after the i-th day to get a warmer temperature. If there is no such day, set answer[i] = 0.
Example: temperatures = [73,74,75,71,69,72,76,73] → [1,1,4,2,1,1,0,0].
[1,1,4,2,1,1,0,0]