zoukankan      html  css  js  c++  java
  • 【leetcode】1475. Final Prices With a Special Discount in a Shop

    题目如下:

    Given the array prices where prices[i] is the price of the ith item in a shop. There is a special discount for items in the shop, if you buy the ith item, then you will receive a discount equivalent to prices[j] where j is the minimum index such that j > i and prices[j] <= prices[i], otherwise, you will not receive any discount at all.

    Return an array where the ith element is the final price you will pay for the ith item of the shop considering the special discount.

    Example 1:

    Input: prices = [8,4,6,2,3]
    Output: [4,2,4,2,3]
    Explanation: 
    For item 0 with price[0]=8 you will receive a discount equivalent to prices[1]=4, therefore, the final price you will pay is 8 - 4 = 4. 
    For item 1 with price[1]=4 you will receive a discount equivalent to prices[3]=2, therefore, the final price you will pay is 4 - 2 = 2. 
    For item 2 with price[2]=6 you will receive a discount equivalent to prices[3]=2, therefore, the final price you will pay is 6 - 2 = 4. 
    For items 3 and 4 you will not receive any discount at all.
    

    Example 2:

    Input: prices = [1,2,3,4,5]
    Output: [1,2,3,4,5]
    Explanation: In this case, for all items, you will not receive any discount at all.
    

    Example 3:

    Input: prices = [10,1,1,6]
    Output: [9,0,1,6] 

    Constraints:

    • 1 <= prices.length <= 500
    • 1 <= prices[i] <= 10^3

    解题思路:因为prices.length最大只有500,所以O(n^2)的时间复杂度完全可以接受。

    代码如下:

    class Solution(object):
        def finalPrices(self, prices):
            """
            :type prices: List[int]
            :rtype: List[int]
            """
            res = []
            for i in range(len(prices)):
                discount = 0
                for j in range(i+1,len(prices)):
                    if prices[i] >= prices[j]:
                        discount = prices[j]
                        break
                res.append(prices[i] - discount)
            return res
  • 相关阅读:
    Mysql:Group Replication & Replication
    使用winsw包装服务将nginx包装为Windows服务
    Nginx的一些常用配置
    在ASP.NET Core 2.0中使用Facebook进行身份验证
    展现层实现增删改查
    ABP创建应用服务
    ABP领域层定义仓储并实现
    ABP领域层创建实体
    通过模板创建一个ABP项目
    Android UI组件:布局管理器
  • 原文地址:https://www.cnblogs.com/seyjs/p/13585541.html
Copyright © 2011-2022 走看看