力扣——candy （分糖果） python实现

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题目描述：

中文：

老师想给孩子们分发糖果，有 N 个孩子站成了一条直线，老师会根据每个孩子的表现，预先给他们评分。

你需要按照以下要求，帮助老师给这些孩子分发糖果：

每个孩子至少分配到 1 个糖果。
相邻的孩子中，评分高的孩子必须获得更多的糖果。

那么这样下来，老师至少需要准备多少颗糖果呢？

英文：

There are N children standing in a line. Each child is assigned a rating value.

You are giving candies to these children subjected to the following requirements:

Each child must have at least one candy.
Children with a higher rating get more candies than their neighbors.

What is the minimum candies you must give?

class Solution(object):
def candy(self, ratings):
"""
:type ratings: List[int]
:rtype: int
"""
s = 0
n=len(ratings)
s+=n
tmp =[0]*n
for i in range(1,n):
if ratings[i]>ratings[i-1]:
tmp[i] = tmp[i-1]+1
for i in range(n-2,-1,-1):
if ratings[i]>ratings[i+1]:
tmp[i]=max(tmp[i],tmp[i+1]+1)
s+=sum(tmp)
return s