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Daily Temperatures

Detailed guide and Python implementation for the 'Daily Temperatures' problem.

問題提起

簡単

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.

Write a function dailyTemperatures(temperatures: List[int]) -> List[int].

制約
  • 1 <= len(temperatures) <= 10^5
  • 30 <= temperatures[i] <= 100

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

Day 0 (73): next warmer is day 1 (74), wait 1 day. Day 2 (75): next warmer is day 6 (76), wait 4 days. Days 6 and 7 have no warmer future day.

Example 2
Input
temperatures = [30, 40, 50, 60]
Output
[1, 1, 1, 0]
Explanation

Each day except the last has a warmer day immediately after.

Example 3
Input
temperatures = [30, 60, 90]
Output
[1, 1, 0]
Explanation

Temperatures are strictly increasing except the last day.

Need a Hint?
Consider using Stack-specific data structures like sets or heaps.
Edge Cases to Watch
  • Empty input structures
  • Single element inputs
  • Large numerical bounds

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