// Daily Temperatures — MEDIUM

// Category: stack

Given an array of integers `temperatures` representing the daily temperatures, return an array `answer` such that `answer[i]` is the number of days you have to wait after the `i`-th day to get a warmer temperature. If there is no future day with a warmer temperature, keep `answer[i] == 0`.

Use a **monotonic decreasing stack** storing indices.

Example: temperatures = [73,74,75,71,69,72,76,73]

Output: [1,1,4,2,1,1,0,0]