Alex and Lee play a game with piles of stones.  There are an even number of piles arranged in a row, and each pile has a positive integer number of stones piles[i]. The objective of the game is to end with the most stones.  The total number of stones…

Question 877. Stone Game Solution 题目大意: 说有偶数个数字,alex和lee两个人比赛,每次轮流从第一个数字或最后一个数字中拿走一个(偶数个数字,所以他俩拿的数字个数相同),最后比谁拿的数字总和大.题目是让我们设计一个算法,对于任意给定的一系列数字,判断如果alex先选,是否一定赢(所有数加起来是奇数,所以不存在平局)? 思路: 朴素的暴力递归所有可能的走法,回归的时候只贪心地保留更优的那个解就可以了.然后对于可能的重复的子问题,用一个表储存之前所有解决过的子…

Alex and Lee play a game with piles of stones.  There are an even number of piles arranged in a row, and each pile has a positive integer number of stones piles[i]. The objective of the game is to end with the most stones.  The total number of stones…

原题链接在这里:https://leetcode.com/problems/stone-game/ 题目: Alex and Lee play a game with piles of stones.  There are an even number of piles arranged in a row, and each pile has a positive integer number of stones piles[i]. The objective of the game is to…

原博客地址 https://blog.csdn.net/androidchanhao/article/details/81271077 题目链接 https://leetcode.com/problems/stone-game/discuss/ https://leetcode-cn.com/contest/weekly-contest-95/problems/stone-game/ 877. 石子游戏 亚历克斯和李用几堆石子在做游戏.偶数堆石子排成一行,每堆都有正整数颗石子 piles[i]…

Alex and Lee play a game with piles of stones.  There are an even number of piles arranged in a row, and each pile has a positive integer number of stones piles[i]. The objective of the game is to end with the most stones.  The total number of stones…

问题 有偶数堆石头(数组长度为偶数),每堆石头有一些石头(数组元素为正),石头的总数是奇数.Alex和Lee两个人轮流取石头堆,每次可以从头部或尾部取,Alex先取. 给定这样一个数组,两人都以最优策略去玩这个游戏,如果Alex一定会获胜则返回True,否则返回False 思路 做法1:因为有偶数堆,所以先玩游戏的Alex可以做到:一直取第偶数堆,或者一直取第奇数堆.石头总数是奇数,那么第偶数堆的石头总数和第奇数堆的石头总数,一定有一方大于另一方.所以Alex可以计算出哪方大来取.假设第奇数堆的…

题目如下: Alex and Lee play a game with piles of stones.  There are an even number of piles arranged in a row, and each pile has a positive integer number of stones piles[i]. The objective of the game is to end with the most stones.  The total number of…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 数学 双函数 单函数 + 记忆化递归 动态规划 日期 题目地址:https://leetcode.com/problems/stone-game/description/ 题目描述 Alex and Lee play a game with piles of stones. There are an even number of piles arra…

876. Middle of the Linked List first submission # Definition for singly-linked list. # class ListNode: # def __init__(self, x): # self.val = x # self.next = None class Solution: def middleNode(self, head): """ :type head: ListNode :rtype: L…