Given an array of integers temperatures representing daily temperatures, return an array answer such that answer[i] is the number of days until a warmer temperature. If no warmer day ahead, answer[i] = 0.
temperatures = [73,74,75,71,69,72,76,73][1,1,4,2,1,1,0,0]temperatures = [30,40,50,60][1,1,1,0]