739. Daily Temperatures

Given an array of integers temperatures represents the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the ith day to get a warmer temperature. If there is no future day for which this is possible, keep answer[i] == 0 instead.

Example 1:

Input: temperatures = [73,74,75,71,69,72,76,73]
Output: [1,1,4,2,1,1,0,0]

Example 2:

Input: temperatures = [30,40,50,60]
Output: [1,1,1,0]

Example 3:

Input: temperatures = [30,60,90]
Output: [1,1,0]

def dailyTemperatures(self, temperatures: List[int]) -> List[int]:
	n = len(temperatures)
	result = [0] * n
	stack = []

	for i in range(n):
		while stack and temperatures[i] > temperatures[stack[-1]]:
			prev_index = stack.pop()
			result[prev_index] = i - prev_index
		stack.append(i)

	return result