Daily Temperatures

Given a list of daily temperatures T, return a list such that, for each day in the input, tells you how many days you would have to wait until a warmer temperature. If there is no future day for which this is possible, put 0 instead.

For example, given the list of temperatures T = [73, 74, 75, 71, 69, 72, 76, 73], your output should be [1, 1, 4, 2, 1, 1, 0, 0].

Note: The length of temperatures will be in the range [1, 30000]. Each temperature will be an integer in the range [30, 100].

分析

单调递增，遇到大的，弹出前面小的，并且存储小的结果

stack里存的是Index

class Solution:
    def isValid(self, s: str) -> bool:
        left ='([{'
        right = ')]}'
        stack = []
        for i in s:
            if i in left:
                stack.append(i)
            elif i in right:
                if not stack or left.find(stack[-1]) != right.find(i):
                    return False
                stack.pop()
        return True if not stack else False